Biology Homework Questions & Answers Archive

What organelle creates stored chemical energy through the process of photosynthesis? Ribosomes Vacuole Golgi Apparatus Chloroplast

Why are multiple action potentials generated in response to a long stimulus that is above threshold?

The organs for taste receptors are called most of which are found associated with Multiple Choice taste pores; the larynx taste buds; roof of nasal cavity papillae; taste buds taste buds; papillae

The anchor used to start a new DNA strand is called a starter trigger primer

For the following reaction sequence, not all substrates and products are shown. ADH and ADLH are enzymes that catalyze each reaction in liver cells. A buildup of acetaldehyde is toxic to cells. Many different versions of the enzymes are present in human populations. Some versions have faster or slower reaction rates than others. Based on this information and your knowledge about biology, select true or false for each of the following statements. True False Different versions of the ADH and ADLH enzymes could have arisen in the population through errors that occurred during DNA replication. The genes that code for the ADH and ADLH enzymes are found only in liver cells. If a person takes in large quantities of ethanol in a short amount of time, mutations will occur that lead to faster ADH reaction rates. Individuals with slow ADLH enzymes are more likely to suffer adverse effects from ethanol consumption than individuals with fast ADLH enzymes. The observation that many different versions of these enzymes exist in human populations means that the enzymes are not critical for survival and reproduction.

b. What are the dark regions of the striations, and what are the light regions?

What is a group of interneurons called that synapse with each other, receiving input and generating output, and performing a common function? Multiple Choice Tract Neuronal pool Receptor Ganglion

Question 18 1 pts What biological process did scientists use as an inspiration for engineering enzymes to remove molecular tags from red blood cells? phosphate transfer from ATP endocytosis enzyme activation natural selection

Question 4.5A/6 A recent telephone poll of 1000 randomly selected women revealed that 600 women used birth control. Part 2 of 3. (Cumulative chance there has been progress: 0.51%) Identify the population in this given problem. Choose the correct answer below. A. The population is the 600 women B. The population is the 1000 women selected C. The population is all women in the country D. The population is all women in the world

Which of the following is the degradation of complex compounds during cellular metabolism?

During which phase does the nuclear membrane reform around the chromosomes? Multiple Choice Early metaphase Prophase Anaphase Metaphase Telophase

Use the figure to the right to (a) identify the triangle as scalene, isosceles, or equilateral and as (b) acute, obtuse, or right. The parallel markings (the two small parallel lines) on two or more sides indicate that the marked sides are of equal length. - Equilateral - Isosceles - Scalene (b) Is this triangle acute, obtuse, or right? - Right - Acute - Obtuse

You know that this cell is in a(n) solution because the cell Extracellular Fluid

What fraction of the offspring from a cross between two animals with the genotype A a B b C c are expected to be homozygous recessive for the three traits?

There are 4 green apples and 7 red apples in a basket. (a) What is the ratio of all apples in the basket to green apples? (b) What is the ratio of red apples to all apples in the basket?

What are CAM and C4 plants as compared to C3 plants? - How are they similar to each other? - How are they different? - What are types of plants that use each process?

This test: 66 point(s) Question 21 of 66 possible This question: 1 point(s) possible Submit test Part A Select the correct explanation for the fact that a carrier of a recessive genetic disorder does not have the disorder. In a recessive disorder, only a single functioning allele is necessary to determine a normal phenotype. The dominant allele for the gene determining the disorder represses protein production from the recessive allele. Affected individuals have recessive mutations, but a carrier has a dominant mutation. Next

An echocardiogram reveals Charles, an ultramarathon runner, has an enlarged left ventricle. As this increase in ventricular size is supported by increased blood flow and ATP production due to the training Charles has undertaken, this increase in heart size demonstrates Physiological hyperplasia Physiological hypertrophy Pathological metaplasia Pathological hypertrophy Benign neoplasia

How sensitive to changes in water temperature are coral reefs? To find out, scientists examined data on sea surface temperatures and coral growth per year at locations in the Gulf of Mexico and the Caribbean Sea. The table shows the data for the Gulf of Mexico. Sea surface temperature: 26.7, 26.6, 26.6, 26.5, 26.3, 26.1 Growth: 0.85, 0.85, 0.79, 0.86, 0.89, 0.92 Click to download the data in your preferred format. CSV Excel JMP Mac-Text Minitab14-18 Minitab18+ PC-Text R SPSS TT Crunchlt! Find the correlation r step by step. Let x denote the sea surface temperature and y denote the coral growth. First, find the mean and standard deviation of each variable. Give your answer to at least two decimal places but if you are calculating the values by hand, avoid rounding during intermediate steps, mean for the x data set, x̄ = degrees

A/an is the structure from which chordae tendineae originate. Multiple Choice - pulmonary valve - aortic valve - interatrial septum - papillary muscle

Identify the organ indicated in the figure.

What type of junction would you expect to connect adjacent cells that make up the outer layers of the skin? Tight junction Adhesion junction Gap junction Petticoat junction

Select all that apply Added sugars are incorporated into foods during processing to: inhibit the growth of mold. decrease moisture content. increase tenderness of food. decrease the need for sodium. contribute to flavor.

The thinnest cytoskeletal structures, responsible for cellular locomotion and intracellular movements during cell division are: microtubules lysosomes microfilaments intermediate filaments

Question 16 1 pts There are several levels of organization of protein molecules. The linear sequence of amino acids joined together by peptide bonds is the: primary structure quaternary structure secondary structure tertiary structure

The extracellular matrix (ECM) provides strength to animal's bodies. For example, the ECM in resists compression and provides protection to joints.

Question 8 1 pts Peptide bonds are found in: any type of molecule carbohydrates inorganic compounds lipids proteins

4. The photo shows a sample of sandstone, a type of sedimentary rock. Which step occurred first in the formation of sandstone? SC.4.E.6.1 A. Magma erupted and cooled on the bottom of the ocean. B. Rocks were broken down into sediments by wind, water, or ice. C. Sediments were cemented together beneath the surface. D. Sediments were squeezed together beneath the surface.

UNIT 3 - MILESTONE 3 Identify the step associated with nucleic acid probing. Tracking dye is added to DNA samples, which are then pippetted into wells. Single-stranded DNA is produced by denaturing DNA samples. DNA samples are cut with restriction enzymes. DNA moves toward a positive electrode.

Researchers wondered whether the size of a person's brain was related to the individual's mental capacity. They selected a sample of 5 females and 5 males and measured their MRI image pixel counts and IQ scores. The data is reported to the right. Complete parts (a) through (d) below. Females Males MRI IQ MRI IQ 991,305 138 949,395 140 951,545 137 924,059 135 816,932 133 965,353 133 833,868 132 955,003 139 790,619 135 1,079,550 141 (a) Draw a scatter diagram treating MRI count as the explanatory variable and IQ as the response variable. Choose the correct diagram below. A. B. C. D.

Select the statements that describe the diagram depicting enzyme action. The figure above is an example of feedback inhibition. The figure above is an example of competitive inhibition. The figure above is an example of non-competitive inhibition. The figure above is an example of a metabolic pathway. The figure above illustrates an irreversible process.

The ramus and the make up the angle on the mandible. a. coronoid process of the mandible b. body of the mandible c. condylar process of the mandible d. mandibular notch

A nucleotide is one of four bases. the sugar backbone of RNA a complex formed of a base, a sugar and the bond between them. a laundry detergent.

Which bone(s) forms the cheek bones?

Fill in the Blank Question LPS is the abbreviation for found in the uppermost layer of the outer membrane.

1. Place these items in the correct sequence. eBook Doint References Drag the text blocks below into their correct order. Helper T-cell secretes IL-4. B-cell is activated and begins to proliferate. Antigen is presented on MHC Class II molecule on B-cell surface. TCR and CD4 molecules on the surface of a helper T-cell interact with MHC Class II molecule expressing antigen. Memory B-cells and plasma cells are produced. Free antigen binds to B-cell receptor (BCR). 2. Which of these processes involves a phagocytic cell?

A chicken farmer bought 2480 baby chicks. Of this number, 1984 lived to maturity. What percent loss was experienced by the chicken farmer? The loss experienced by the chicken farmer is %. (Type an integer or a decimal.)

Cell Components Component Detail Description (single/double membrane, location, etc.) Specific Function --- --- --- *Plasma membrane Single membrane surrounds the cell Regulates the entry and exit of substances *Nuclear Membrane (envelope) Double membrane surrounds the nucleus Protects the nucleus and controls movement of materials in and out of the nucleus *Nucleus Double membrane located in the cytoplasm Stores genetic material DNA and coordinates cell activities *Nucleolus Located inside the nucleus Produces ribosomal RNA (rRNA) and assembles ribosomes *Ribosome No membrane, found in the cytoplasm or on the rough ER Synthesizes proteins *Rough endoplasmic reticulum Single membrane located in cytoplasm, has ribosomes on its surface Synthesizes and processes proteins *Smooth endoplasmic reticulum Single membrane located in the cytoplasm, lacks ribosomes Synthesizes lipids and detoxifies certain chemicals *Golgi body Single membrane located in the cytoplasm Modifies sorts and packages proteins and lipids for secretion or delivery to other organelles *Lysosomes *Vacuole Cell wall (plant) Extracellular Matrix Cytoplasm Mitochondria

The left and right brachial plexuses are networks of nerves that supply the - upper limb - neck - abdomen - thorax

A person with type AB blood has RBC antigen(s). Multiple Choice no anti-A and anti-B anti-A anti-B A and B

In an actively dividing eukaryotic cell, the G1, S, and G2 phases collectively constitute the .

What molecule is represented by the molecular model shown below? Starch Adenosine triphosphate (ATP) Glucose Adenosine diphosphate (ADP)

Microbes that are pathogenic to humans and animals are in their requirement for pre-formed organic matter. heterotrophic autotrophic phototrophic

Which can be a cause of pallor? Cold temperatures Liver malfunctions Bacterial infection Increased blood supply

Diapedesis is the movement of leukocytes out of . O the bone marrow O the liver and spleen O blood vessels

Provide support, protection, and movement.

Multiple Choice Question Memory B and memory T cells respond to antigens during a immune response. primary secondary

Following proliferation to form a clone, some B cells differentiate into B cells, which can rapidly respond to a future exposure to the same antigen.

The antibody-mediated immune response is also known as the immune response.

Which types of dietary fats can increase blood LDL concentrations ? a. Polyunsaturated fatty acids, monounsaturated fatty acids b. Omega-3 fatty acids, cis-fatty acids c. Fiber, omega-6 fatty acids d. Saturated fatty acids, trans-fatty acids

The oxidase test is used to classify bacteria based on the presence or absence of cytochrome oxidase enzyme in an unknown organism. Here are the results of your oxidase test. What can you conclude? The oxidase test on the unknown bacterium is positive. The oxidase test result cannot be determined from this swab. The oxidase test on the unknown bacterium is negative. The oxidase test on the unknown bacterium is neutral.

Chapter 11 Multiple Choice Question 3 Part A The greatest species diversity is found in which of the following groups? insects birds mammals flowering plants fish

The endospore stain is similar to the acid-fast stain in that - a mordant is used to set the dye - both stain the endospore - heat is applied to force the dye in - acid alcohol is used to wash the dye out of the cell

How would you label intensities on body weight exercises?

Question 8 Damage to the optic chiasm results in the complete loss to which part of your vision?

Uracil is found in most RNA, while is found in most DNA. 5-methyluracil 3-methyluracil 3-methylguanosine 5-methylguanosine

If structure A is an enzyme in the image below, name the structure B. A activating molecule (B) substrate (C) activation energy (D) active site

The papillary layer of the dermis consists of areolar tissue containing numerous collagen and elastic fibers. Folds in the tissue are called reticular papillae dermal papillae hair follicles sebaceous glands

During development, a number of embryonic cells called fuse into one large structure that is the muscle fiber. osteoblasts erythrocytes myoblasts chondroblasts

Sylvie surveyed a random sample of 50 subscribers to the fast bike magazines to find the number of bikes they own and the features of them. Of the subscribers, 10 own fewer than 3 vehicles. There are 400 subscribers to the fast bike magazines. Based on the above data, what will be the reasonable estimate for the number of subscribers of fast bike magazine who own fewer than 3 vehicles? What is the type of random sampling preferred to get the sample given that we do not have information of all 400 subscribers? 50, Stratified sampling. 40, Cluster sampling. 30, Simple random sampling. 80, Systematic random sampling.

Multiple Choice Question An ectopic pregnancy occurs when donated sperms are deposited in the uterine tube the blastocyst implants high in the uterus near the uterine tube the pregnancy lasts more than 40 weeks implantation occurs outside of the uterus

Which organelle is involved in the synthesis of cholesterol? Golgi apparatus rough endoplasmic reticulum smooth endoplasmic reticulum mitochondria

All of the following are true of smooth muscle EXCEPT spindle shaped multinucleated involuntary nonstriated

Sylvia accidentally touches a hot stove and quickly pulls her hand back. This is an example of a (A) association (B) instinct (C) learning (D) reflex

Most cells are relatively small for which of the following reasons? It is easier for diffusion of wastes out of the cells to occur. It is easier for cells to be phagocytized. It is easier to transport molecules against their concentration gradient. It is easier for diffusion of nutrients into the cells to occur.

What is the cytokine that slows the growth of a tumor and kills sensitive tumor cells?

Faye is 4 ft 10 in tall. Convert her height to inches.

What structures develop from the basal plates during embryonic development? Check all that are correct. Check All That Apply - Anterior and lateral horns of gray matter - Anterior part of gray commissure

Cellular respiration can be used to break down carbohydrates other than glucose. If a cell completely broke down maltese (C22H22O31), how many CO2 molecules would be yielded?

4. Which action minimizes the risk of introducing glass particles into the syringe when drawing medication from an ampule? A. Using minimal force to snap the neck of the ampule B. Using gauze to cover the top of the ampule when snapping it C. Using a filter needle or straw to draw the medication from the ampule D. Allowing the medication to settle after the ampule has been snapped open Which action might the nurse take when drawing up medication from an ampule? A. Hold the ampule upside down while inserting the filter needle. B. Inject air into the ampule before withdrawing the medication. C. Hold the ampule horizontally while inserting the filter needle. D. Expel air bubbles from the syringe while the filter needle is still inside the ampule.

Major tissue type that carries nerve impulses

Tissues that provide strength and support for areas subjected to stresses from many directions are A dense irregular connective tissues. (B) tendons. (C) ligaments. (D) reticular tissues. (E) areolar tissue.

Flavia was curious if a sample first quartile (or Q1) was an unbiased estimator of a population first quartile. She started with a large normally distributed population of test scores whose first quartile was Q1=70 points. She then took a random sample of 6 tests and calculated the first quartile of the sample. She replaced those tests and repeated this process for a total of 50 trials. Her results are summarized in the dotplot below, where each dot represents the first quartile from a sample of 6 tests. Based on these results, does sample first quartile appear to be a biased or unbiased estimator of population first quartile? Hint: The population first quartile is 70. Choose 1 answer: (4) Sample first quartile appears to be a biased estimator since it consistently underestimated the population first quartile. (0) Sample first quartile appears to be a biased estimator since it consistently overestimated the population first quartile. (c) Sample first quartile appears to be an unbiased estimator of the population first quartile.

Nondisjunction may cause trisomy 21. Turner syndrome. Jacobs syndrome. Klinefelter syndrome. All answers are correct.

Multiple Choice Question How might lipids synthesized in the mitochondria be transferred to other cellular membranes? • Vesicular transport • Lateral diffusion • Lipid exchange proteins Need help? Review these concept resources.

Which two main fuels supply energy for physical activity in the body? Sugar and fatty acids Vitamins and minerals Amino acids and water Protein and vitamin B Folate and fiber

The type of bone that is arranged in a grid-work pattern is known as bone, compact spongy soft trabecular

Determine whether each label describes skeletal or cardiac muscle. Labels (i) All calcium ions from sarcoplasmic reticulum (ii) Cells have single nucleus (iii) Calcium ions from extracellular fluid and sarcoplasmic reticulum (iv) Voluntarily controlled (v) Functions to pump blood (vi) Cells have multiple nuclei

Identify the bone labeled "N" Fibia Tibia Ulna Radius

What type of tissue makes up the epidermis? Nerve tissue Muscle tissue Epithelial tissue Connective tissue

The cytoplasm of the cell contains fluid with dissolved solutes and suspended particles, acts as a barrier to the external environment, contains organelles, contains fluid with dissolved solutes, suspended particles and contains organelles, Contains the genetic material for the cell.

Population Ecology Populations cannot grow if they do not have what the members of the population need to survive. Which of the following is something that might limit the speed at which a population can grow? The lack of available shelter An abundance of food

The structure of a chloroplast is closely tied to its function as the site of photosynthesis. From Biology by Campbell and Reece se 2008 Pearson Education, Inc. Some of the following statements are true for chloroplasts; others are true for mitochondria. Which statements are true for chloroplasts? Select the three that apply. - They have membranous sacs called thylakoids that are surrounded by a fluid called stroma. - Their inner membrane has infoldings called cristae. - They are the sites of reactions that convert solar energy into chemical energy. - Their matrix contains enzymes that function in cellular respiration. - They are the sites of reactions that convert chemical energy from food molecules to ATP. - They contain the green pigment chlorophyll.

Researchers wanted to study whether or not Botox injected under the arms can reduce sweating. Which of these is a matched pairs design? Randomly assign the underarms of some subjects to be injected with Botox, and those of other subjects with salt water. For each subject, one underarm is injected with Botox, and the other with salt water. Submit Question

Which type of selection increases overall genetic variation in a population?

pollen is carried by wind Gymnosperms Bryophytes Angiosperms

Which is NOT an example of homeostasis? Increased estrogen during the menstrual cycle increases the number of progesterone receptors in the uterus. Increased blood pressure in the aorta stimulates mechanisms to lower blood pressure. Increased blood sugar stimulates the release of a hormone from the pancreas that stimulates the liver to store blood sugar. Decreased body temperature stimulates a neural response that increases body temperature. Increased blood calcium levels stimulates the release of a hormone that lowers blood calcium levels.

(a) Find the odds in favor of drawing a black card. (b) Find the odds against drawing a face card that is a diamond.

A structure that helps prevent food from entering the pharynx prematurely is the epiglottis.

Equilibrium: Where Supply Meets Demand - End of Chapter Problem When British regulators were forced to suspend the license of a flu vaccine plant in Liverpool operated by the Chiron Corporation due to concerns over bacterial contamination, the number of flu vaccines available in the United States market decreased by 48 million doses. This was nearly half of the total supply of vaccines in the market. a. Shift the appropriate curve or curves to show this dramatic change in the market for flu vaccines. Market for flu vaccines b. As a result of the decline in available flu vaccines, the equilibrium price should and the

The study of normal body structures is called physiology anatomy pathology microscopy biology

Question 13 The species of modern humans is called - Homo erectus - Homo sapiens - Homo habilis - early Homo - Australopithecus

Test 3 Ch 19 The opening and closing of the heart valves is caused by Multiple Choice contraction and relaxation of papillary muscles that pull on heart strings. contraction of the smooth muscle in the walls of the great vessels leaving the heart. action potentials within the cusps of the valves. pressure changes of alternating contraction and relaxation during the cardiac cycle.

Almost all enzymes are 1. DNA 2. lipids. 3. carbohydrates. 4. proteins. 5. amino acids. 3 points

The active site of an enzyme 1. never changes shape. 2. forms no chemical bonds with substrates. 3. determines, by its structure, the specificity of the enzyme. 4. looks like a lump projecting from the surface of the enzyme. 5. changes the ΔG of the reaction.

Student 1 114 132 79 24 30 18 student 2 92 130 67 17 22 13 student 3 90 b / m 102 b / m 60 b / m 54 b / m 90 b / m 24 b / m student 4 72 140 60 30 70 16 student 5 90 120 95 25 28 18 bpm student 6 420 456 96 300 325 150 student 7 102 132 82 66 78 38 student 8 188 210 48 210 230 120 breaths student 9 140 beats 288 beats 67 beats 60 breaths 96 breaths 32 breaths student 10 95 117 64.33 23 29 13.33 student 11 119 97 105 28 40 15 student 12 82 80 81 16 18 17 student 13 114 140 78 50 70 26 student 14 74 72 72 7 7 7 student 15 104 115 87 29 32 21 student 16 72 150 42 36 54 28 student 17 72 164 62 52 98 47 student 18 103 bpm 113 bpm 73 bpm 21 b / m 47 b / m 16 b / m student 19 80 88 85.33 19 18 18.33 student 20 112 BPM 126 BPM 58.3 BPM 14 BPM 16 BPM 11.7 BPM student 21 109 128 87 28 37 14 student 22 68 76 61.3 19 20 13 student 23 128 132 85 11 11 9 student 24 124 130 81.6 20 42 12.6 student 25 102 121 78 34 39 19 student 26 115 bpm 132 bpm 81.33 24 31 17.66 student 27 88 112 74.66 39 56 27.33 student 28 106 124 77.3 25 41 12 student 29 149 151 97.33 41 43 17.67 student 30 100 114 58.7 22 26 13.3 student 31 72 108 68 24 35 15 student 32 82 89 79 26 30 21 student 33 105 91 105 30 17 30 student 34 112 116 65.3 11 18 8.3 student 35 144 160 100 22 25 15 student 36 79 75 66 20 25 16 student 37 84 71 42 25 30 11.3 student 38 90 80 21 25 20 18 student 39 126 144 87 35 46 19 student 40 88 76 69.33 13 11 9.67

Look at the graph below. It shows how three runners ran a 100-meter race. Which runner stopped for a rest?

La glándula tiroides y la suprarrenal están clasificadas como tejido:

Identify characteristics of a secondary immune response: Select all that apply - It occurs after the second and subsequent exposures to an antigen. - Antibodies first appear within hours, peaking at day 3. - IgG antibodies are formed first.

About 70% of the ventricle filling is achieved passively without the contraction of the atria. True or False

What process results in the release of stored glucose? Multiple Choice Glycogenolysis Glycogenesis Glycolysis

Lecture Ch 13 HW: The Peripheral Nervous System Multiple Choice Question 13.31 Part A Which muscle or muscle group is served by the femoral nerve? gastrocnemius hamstring group quadriceps femoris group gluteus maximus

Question 4 (1 point) Listen What are the benefits of consuming whole grains? Whole grains are good sources of fiber, vitamins, phytochemicals, and more. Whole grains promote desirable blood glucose levels. Whole grains support weight loss and decreased disease risk. All of the choices are correct. Previous Page Next Page Page 4 of 15

A distinguishing characteristic of red algae is that they lack and

Question 33 3 pts Factors that help to perpetuate temperate grasslands, such as the American prairies, and prevent them from becoming woodlands include large numbers of cacti. periodic drought and fires. mild winters with very little rain. poor soil.

Which structure in a ciliate may contain up to 1000 copies of each chromosome?

The use of the fingers for dissection purposes is considered sharp dissection.

Find and describe the location of the radial tuberosity.

A relative dating principle used to determine whether fault M is younger or older than layer I could be principle of fossil succession principle of inclusions principle of lateral continuity principle of superposition principle of cross cutting relations principle of original horizontality

Why do we use model organisms in science? Choose all that apply Model organisms are easier to maintain and manipulate in the lab Model organisms were designed to be functionally similar to humans Some of the genes found in model organisms are similar to genes in humans Experiments that would be impossible or unethical to do on humans are possible with model organisms Model organisms are different from humans, and used as the counter-example to humans

How would the membrane lipid composition of fish found in very cold waters compare with that of a warm-blood mammal like a polar bear? (Select all that apply.) A fish living in cold waters would have more unsaturated fatty acids in their cell membranes because those fatty acids pack together less tightly and remain fluid at cooler temperatures. A warm-blooded animal like a polar bear would have more cholesterol, since this would make cell membranes more fluid at higher temperatures and therefore helping them to stay intact.

Select all of the following that are functions of the blood in the human body. Check All That Apply transports oxygen, nutrients, wastes, hormones produces heat defends the body against pathogens produces hormones defends the body against blood loss excretes waste such as carbon dioxide plays an important role in homeostasis by regulating body temperature

In which reproductive cycle of the virus does the viral DNA integrates with the host DNA? Apoptosis Cycle Life Cycle Lytic Cycle Lysogenic cycle

All of the statements regarding archaea are true EXCEPT - they reproduce by binary fission. - they contain a rigid cell wall. - they contain peptidoglycan in their cell walls. - they often grow in extreme environments. - they are found as single cells.

A trait is a discrete with a known quality.

Select all that apply Select all the options that indicate that the spleen is a reservoir. Platelets Lymphocytes Eosinophils Erythrocytes

Why do these organisms appear as different colors?

(a) What was the greatest amount of rainfall in a month? (b) When did the greatest decrease in rainfall occur? July to August August to September September to October October to November

The eruption of Krakatau in 1883 is infamous for: Multiple Choice blowing the entire island apart. none of these events. the loudest sound ever heard. all of these events. a tsunami that killed 36,000 people.

Adenine Cytosine Guanine Uracil Thymidine

Lymphatic nodules are located in the of the lymph node. capsule cortex medulla

Which line of defense consists of external barriers?

During one shift, the express lane clerk recorded how many times customers violated the "10 items or less" rule for his lane. In particular, he recorded how many items over the limit each violator placed on the conveyor belt. This data is summarized in the histogram below. NOTE: The last class actually represents "7 or more items," not just 7 items. What is the frequency of times the limit was exceeded by less than 6 items? Answer: times

Sleep walking and sleep talking are most likely to occur during sleep. stage 2 stage 3 REM stage 4

What is necessary for optimal healing to occur when bones are broken? Choose three. Immobilization Time Alignment Exercise

Which of the following pairs are the best examples of homologous structures? owl wing and hornet wing bat wing and bird wing bones in the bat wing and bones in the human forelimb eyelessness in the Australian mole and eyelessness in the North American mole

Important differences between Taenia solium and Taenia saginata include all of the following EXCEPT Taenia does not cause cysticercosis Taenia saginata does not have a hook in the scolex intefinediate host is cattle in Taenia saginata intermediate host is pork in Taenia saginata

The following question refers to this phylogenetic tree, depicting the origins of life and the three domains. Horizontal lines indicate instances of gene or genome transfer. A possible phylogenetic tree for the three domains of life. Which of these processes can be included among those responsible for the horizontal components of the figure? point mutations binary fission endosymbiosis mitosis

Adapted from Biology by Campbell and Reece Pearson Education, Inc. Place the terms in the appropriate blanks to complete the sentences. Not all terms will be used. negative 1. This heating system maintains room temperature at or near a particular value, known as the set point. sensor increases 2. You open the window, and a blast of icy air enters the room. The temperature drops to 17 degrees Celsius, which acts as a stimulus to the heating system. stimulus 3. The thermostat is a sensor that detects the stimulus and triggers a response.

What process was invented by Pasteur to keep liquids and foods at a certain temperature to prevent spoilage?

A small organ found along the course of a lymphatic vessel that filters the lymph and functions as an activation site for B and cells is called a lymph.

In the equation (r N(1-fracNK)) what does (r) represent? (A) Population size and carrying capacity together (B) Carrying capacity (C) Intrinsic growth rate (D) Population size (E) None of these are correct

Which gives epithelial cells the ability to withstand significant mechanical stress? Occludins Tight junctions Connexons Desmosomes Gap junctions

Find P (musician is a female).

Intercalated disks are specialized connections only found in the following muscle(s): cardiac muscle skeletal muscle both none of the above

Homework Biology 1001 Oral exam 1 Ellen Borteh 09/27/24 6:13 PM Completed: 20 of 36 My score: 18.83/36 pts (52.31%) Save Part A How many fatty acids are in a phospholipid? Clear all Check answer Sep 27 6:13

Which material preserves fossils best? Bedrock Amber Clay Iron

Which pedigree symbol is used to represent a female carrier of a recessive X-linked trait?

coordination

Flowering plants, classified in the division (or phylum) , are a monophyletic clade comprised of almost 300,000 described living species, which is second in species diversity among all phyla after a. Cycadophyta, chordates b. Gnetophyta, insects c. Coniferophyta, chordates d. Magnoliophyta, insects

Humoral defense of the body is an immune system function mediated by: lymphocytes. antibodies. mucous. antigens.

The structure of bone tissue suits the function. Which of the following bone tissues is adapted to support weight and withstand tension stress? compact bone trabecular bone irregular bone spongy bone Submit Request Answer

O mylabmastering.pearson.com Post-Lecture - Chapter 5 - Homework Problem 5.72 - Enhanced - with Feedback 14 of 18 Reviex I Constants I PeriodicTable The following table contains some standard enthalpies of formation, ΔH°f, at 298 K. Substance Formula ΔH°f (kJ / mol) --------- Carbon dioxide CO2(g) -393.5 Carbon monoxide CO(g) -110.5 Methane CH4(g) -74.80 Propane C3H8(g) -103.85 Water H2O(l) -285.8 Water vapor H2O(g) -241.8 Part A Many portable gas heaters and grills use propane, C3H8(g) Using enthalpies of formation, calculate the quantity of heat produced when 11.0 g of propane is completely combusted in air under standard conditions. Assume that liquid water is forming. Express the heat in kilojoules to three significant digits.

The step in designing a customer value-driven marketing strategy in which a company divides a market into distinct groups of buyers is known as market segmentation.

4. ALGAE Ronald owns a fish tank in the shape of a rectangular box. The tank is 18 inches high, 14 inches deep, and 30 inches long. Ronald went on a one-month vacation. When he returned he found that the sides and bottom of his fish tank were covered with algae. What is the area that was covered?

The phase of mitosis in which the chromosomes condense and centrosomes move to opposite poles of the cell is Multiple Choice metaphase. " interphase. anaphase. prophase.

Describe the function of the chordae tendineae and the papillary muscles. What is the significance of the difference in thickness between the wall of the aorta and the wall of the pulmonary trunk? List the correct pathway through which blood must flow in relation to the region of the heart. Assume blood is currently in a vena cava and will eventually enter the aorta. Include the major blood vessels (arteries and veins) attached directly to a heart chamber, the four heart chambers, and the four heart valves in your list.

Question 8 (Mandatory) (2 points) You are reading an article about an outbreak of an infectious disease. Which of the following would you recognize as the full scientific name of the organism causing the disease, just because of the way that it's written? Anthrax staphylococcus Bacillus anthracis E. Coli

The causes the stage to move upward or downward. Select one: a. mechanical stage b. iris diaphragm c. objective lens d. coarse adjustment knob Sally flips the switch to turn on the light in her bedroom and the light does not come on. She notices that all the other lights in the house work. She wonders if the light bulb in her room has burned out. Sally gets a new light bulb and uses it to replace the old light bulb. She turns on the switch and the light works. Thinking the light bulb is bad is which of the following? Select one: a. Theory b. Experiment c. Conclusion d. Observation e. Hypothesis When you over exert yourself in the gym your muscles begin to burn. The burning sensation is because the build up of acid in your muscles cells. What is the primary cause for the build up of that acid?

Which statement describes the muscle response at a stimulation interval of 120 ms (about 8 stimuli per second)? The muscle was only partially relaxed before each stimulus, and the contractions generated more force than individual twitches. The muscle was only partially relaxed before each stimulus, and each contraction generated the same force as an individual twitch. The muscle had time to completely relax before each stimulus, and each twitch generated the same force. The muscle was in the process of contracting when each stimulus arrived, and the contractions generated more force than individual twitches.

The volume of air inhaled or exhaled during a respiratory cycle is called the volume.

Multiple Choice Question What is the role of the epiglottis? Covers the posterior nasal aperture when breathing Covers the glottis when swallowing Covers the esophagus when breathing Covers the glottis when breathing

True brachiation is found in: Old World monkeys chimpanzees and gorillas New World monkeys gibbons and siamangs

Indicated with the letter B in this figure are the digital sheaths.

Of the following events from the light reactions of photosynthesis, which would be expected to occur first? A Light-induced reduction of the primary electron acceptor in the reaction center of PS II takes place. (B) ATP synthase makes ATP (C) NADP+ gets reduced (D) Protons are pumped into the thylakoid space

Which of the following terms is NOT associated with connective tissue? - widely spaced cells - exocrine gland - collagenous fibers - matrix

Where does calcium attach to the contractile protein complex? myosin actin troponin tropomyosin

Which of the following is true about veins? Veins are considered blood reservoirs Venous contain large pressure gradients Veins have thick tunica media Venous valves form from the tunica media

The resting potential of a cell is negative because at rest there is an excess of K+ inside the cell, and the membrane is permeable chiefly to K+.

The cell membrane has many functions. One of the most important is facilitating the passage of molecules into and out of the cell. Some molecules can freely pass through the membrane, while others require a channel in order to enter or leave. Which of the following molecules will pass most freely through the cell membrane? Oxygen Glucose Insulin Water Na+

The basic structural framework of the plasma membrane is primarily made of: cholesterol molecules glycoproteins integral (transmembrane) proteins peripheral proteins phospholipids

The apocrine sweat glands are not the primary gland involved in thermoregulation.

Identifique el grupo al que pertenece esta base nitrogenada en el ARN. Seleccione una: A. Timina B. Purina C. Pirimidina D. Citosina E. Uracilo

Consider the stereoisomers (A-E) drawn below: Which structure is an enantiomer of structure A? structure B structure C structure D structure E

3. At which of the following checkpoints is the DNA checked for damage and, if damage is present, the cell is placed in G0 phase? a. M c. G2 b. G1 d. None of these are correct. 4. Where is the checkpoint that assesses the DNA for damage? a. G1 c. G2 b. S d. M 5. Which of the following act as the brakes of the cell cycle and prevent cells from dividing too quickly? a. oncogenes b. proto-oncogenes c. cyclins d. tumor suppressor genes

Bones such as the carpals that have the same length and width are classified as bones.

Endangered populations typically have a small number of individuals and little genetic variation. Which statements accurately describe the relationship between evolution and genetic variation in an endangered population? Select all that apply. - Genetic drift can lead to allele fixation, and thus reduce genetic variation in populations. - Gene flow between populations tends to increase when genetic variation is low. - Natural selection can decrease genetic variation by favoring alleles that provide the highest fitness. - Mutation rates typically increase when genetic variation is low.

2. Durante el ciclo ovárico en una mujer sana, ¿cuál de los siguientes estímulos provoca directamente la menstruación? A) El aumento de los niveles plasmáticos de estrógenos. B) El descenso de los niveles plasmáticos de la hormona progesterona. C) La disminución de los niveles plasmáticos de la hormona foliculoestimulante. D) El aumento de los niveles plasmáticos de hormonas liberadoras de gonadotrofinas.

1. Peel a section of thin onion skin membrane and place on slide. 2. Place a few drops of iodine solution on the onion skin and cover with a cover slip. 3. Observe and sketch under lower and higher magnification. 4. Label - Cell Wall, Nucleus 1.Why does a specimen viewed under the microscope need to be thin? 2. Why did we add methylene blue to the cheek cells? 3.What structures are visible in your cheek cells? 4. What structures were visible in the Elodea cell? 5. What are some major structural differences between the plant and

Question 18 1 pts The figure below illustrates a eukaryotic cell. Which of the following best describes how the three structures indicated by the arrows work together? To catabolize nutrients and produce ATP for intracellular energy storage To synthesize all ribosomal proteins To synthesize and isolate proteins for secretion or for use in the cell To synthesize lipids and modify toxic substances in order to render them harmless

Chalk forms from - magnesium rich fluids that chemically alter limestone bearing reefs - evaporation of magnesium rich waters - the hard parts of microscopic organisms that accumulate on the sea floor - direct precipitation from seawater

Female Reproductive System

Two individuals start the same training program at the same time, but one is able to grow muscle faster and larger than the other. What is the least likely explanation for this? A. One individual was born with more muscle fibers. B. One individual has a more consistent training schedule. C. One individual is consuming a healthier diet. D. One individual has a more intense training schedule. Please select the best answer from the choices provided. A B C D

Question 18 of 25 Young sea turtles have many natural predators. Which adaptation helps sea turtles successfully reproduce? A. Having eggs that attract predators B. Producing a large number of eggs C. Spending years caring for offspring D. Caring for one offspring at a time

What is the difference between false and true ribs? How many of each are present in humans?

Züchtungsmethoden Züchtung beruht auf der Auswahl von Individuen für die Fortpflanzung über viele Generationen hinweg. So entstanden Tierrassen und Pflanzensorten für die Ernährung sowie Die Entstehung des Saatweizens 1 Stationen auf dem Weg zum Saatweizen (A, B, D Chromosomensätze) Aus archäologischen Funden und durch Vergleiche von Genomen konnte die Entstehung des Saatweizens rekonstruiert werden. Die ersten angebauten Weizenarten waren Einkorn und Emmer. Das Herkunftsgebiet der Getreidearten ist der Vordere Orient. Lange Zeit blieb der Anbau von Weizen hinter dem von Einkorn und Emmer zurück. Er im 11. Jahrhundert etablierte sich Weizen, der sich besser zum Brotbacken eignet. Triticale ist ein Hybride aus tetraploidem Weichweizen (4n) oder hexaploidem Weichweizen (6n) mit diploidem Roggen (2n). Sie tritt auch unter natürlichen Bedingungen auf. Die Kreuzungen sind jedoch meist unfruchtbar. Um eine fruchtbare Form des Triticale zu erhalten, behandelte man das Kreuzungsergebnis mit Colchicin und verhinderte so die Trennung der Chromosomenpaare während der Meiose. 2 Eigenschaften von Roggen, Weizen und Triticale Haustierrassen und Zierpflanzen. Die Individuen unterscheiden sich in der Anzahl der Chromosomensätze. Ein- und Mehrnutzungsrassen Alte Hühnerrassen bringen Bauern doppelt Glück. Früher hielten Bauern meist Hühner, die zweierlei taten - ausreichend Eier legten und Fleisch lieferten. Das soll sich wieder ändern. Zwei Dutzend beigefarbene Hühner und schwarz-bunte Hähne toben durch ihren Auslauf unter alten Eichen, scharren auf dem Kröter Hof im Wendland nach Fressbarem, verstecken sich im Brennnesselfrast. Die Lachshühner sind eine Zweinutzungsrasse. Das heißt, die Hennen haben eine passable Legeleistung, und die Hähne setzen ordentlich Fleisch an. In der üblichen bäuerlichen Hühnerhaltung waren die Rassen dann entweder auf Eier oder Fleisch züchtet. Das führte zur Praxis, dass männliche Küken der drei bis vier weltweit verbreiteten Legehennenlinien gleich nach dem Schlüpfen zu Tierfutter zerhäckselt oder vergast werden. Erste Projekte versuchen, den Missstand zu beseitigen. So lässt die in diesem Jahr gegründete Bruderhahn Initiative des Bauckhof in Klein Sustedt bei Uelzen und fünf weiterer Höfe die männlichen Nachkommen der Legehennen am Leben und macht aus ihnen Masthähnchen. Die Höfe und drei beteiligte Naturkostgroßhändler nehmen einen Aufschlag von vier Eurocent pro Ei und finanzieren damit die Aufzucht der Hähnchen. Sie nennen ihren Aufschlag "Vier Cent für die Ethik". Die Bruderhahn Initiative arbeitet derzeit noch mit einer der industriellen Hybrid-Legerassen. Carsten Bauck will mehr: „Unsere Hähnchenmast mit einer modernen Legerasse ist gewissermaßen eine Brückentechnologie, ein Übergang zu einer modernen Zweinutzungsrasse. Die traditionellen Rassen sind zu naturnah, um in den heutigen Vermarktungsrhythmus zu passen. So legen sie zwischen Weihnachten und Ostern, wenn die Nachfrage am größten ist, nur wenige Eier." (Die Welt 10.11.2012) AUFGABEN 1 Beschreiben Sie die Entstehung des Saatweizens unter Verwendung von Abb. 1. 2 Erläutern Sie die Zuchtziele bei Triticale 3 Erklären Sie anhand von Abb. 3, dass erst durch die Chromosomenverdopplung bei der Erzeugung von Triticale eine nutzbare Getreideart entstanden ist. Mutationszüchtungen Bei der Züchtung wählt man zwischen Individuen, die sich in ihren genetisch bedingten Merkmalen unterscheiden. Diese Unterschiede beruhen auf zufällig auftretenden Mutationen. Unter Mutationszüchtung im engeren Sinne versteht man die Auslösung von Mutationen durch Röntgenstrahlung oder mutagene Chemikalien wie EMS (Ethylmethansulfonat) bei Pflanzen und die anschließende Selektion der Mutanten unter den Nachkommen. Auf einer solchen Mutationszüchtung beruht die Erzeugung einer Kartoffelsorte, mit der Amylopektin für die industrielle Verwertung produziert wird. Für eine Reihe von Anwendungen ist die verzweigte Form der Stärke, das Amylopektin, geeigneter als die unverzweigte Amylose. 4 Kartoffelsorte für die Amylopektin-Produktion AUFGABEN 6 Erklären Sie, dass bei der Mutationszüchtung unter Abertausenden von Mutanten nur selten Formen mit positiv veränderten Eigenschaften auftreten. 7 Im Gegensatz zur Gentechnik werden bei der Mutationszüchtung keine Fremdgene in Lebewesen übertragen. Deshalb sind entsprechende Lebewesen oder Produkte daraus nach dem Gentechnikgesetz nicht kennzeichnungspflichtig. Nennen Sie mögliche Argumente, warum Kritiker dieses Vorgehen dennoch ablehnen könnten.

Which of the following would the nurse expect to assess if a patient has a lesion of the sympathetic nervous system? a) Bilateral dilated pupils b) Unilateral dilated pupil c) Argyll Robertson pupils d) Constricted pupil unresponsive to light

Which structure is a histone? a. Structure A b. Structure B c. None of the above

Which mode of inheritance is characterized by the presence of affected individuals in every generation? Autosomal dominant (AD) Autosomal recessive (AR) X-linked recessive (XR) X-linked dominant (XD)

Question 80 (1 point) Listen Invisible fats include the fats in: margarine. fried foods. shortening. sour cream.

Biology

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