Biology Homework Questions & Answers Archive

A ship carrying 1000 passengers is wrecked on a small island from which the passengers are never rescued. The natural resources of the island restrict the population to a limiting value of 5740, to which the population gets closer and closer but which it never reaches. The population of the island after time t, in years, is approximated by the logistic equation given below, Complete parts (a) through (c). P(t) = 5740 / (1 + 4.74 e^(-0.4 t)) a) Find the population after 15 years. (Round to the nearest integer as needed.)

In addition to protection (physical and chemical barrier), the skin serves other functions. Which of the following is another vital function of the skin? It absorbs vitamin C so that the skin will not be subject to diseases. The cells of the epidermis store glucose as glycogen for energy. It aids in the transport of materials throughout the body. It converts modified epidermal cholesterol to a vitamin D precursor important to calcium metabolism.

The force driving simple diffusion is , while the energy source for active transport is .

Identify a reason why cosmetologists should study and have a comprehensive understanding of haircutting. Select the correct response: because haircutting is the basic foundational skill upon which all hair designs are built because they are licensed to diagnose, treat, prescribe, or work on unhealthy hair and perform any service required in the process because haircutting services are listed under a podiatry license, and performing procedures that are listed under any podiatry license is a primary responsibility of cosmetologists because they are required to inform clients about the parts of the hair that will be affected by haircutting

Extending a joint beyond the zero position is always an abnormal movement.

During flu season, the influenza virus infects many people. During infection, the virus binds to proteins on the outside of a cell and tricks that cell into allowing the virus to enter the cell. Once inside, the virus infects the cell and forces the cell to make more viruses that can then go on to infect more cells. What type of cell transport is the virus using to get into the cell? exocytosis phagocytosis receptor-mediated

All of the following are true of the Rb gene, EXCEPT: Rb mutation of one allele causes retinoblastoma. Rb normally inhibits growth. Rb mutation is common to many types of cancer. Rb is a tumor suppressor which inhibits trascription activity.

Which characteristics are associated with oily skin types? Select the correct response: overproduction of sebum, clogged pores, and open and closed comedones enlarged and clogged pores and comedones on the forehead, nose, and chin insufficient lipid activity and pores that are not visible to the naked eye few imperfections, no sensitivities, barely visible pores, and a radiant complexion

Triglycerides

Dye injected into a plant cell might be able to enter an adjacent cell through a gap junction a tight junction a cell wall plasmodesmata a microtubule

For part 2 of the experiment, the contents of which test tube is disposed of in the HEAVY METALS waste container?

Select all the organisms that are members of domain Eukarya. More than one option may be correct. multicellular protists bacteria archaea fungi animals unicellular protists plants

Compare and contrast the epidermis and dermis. Be sure to discuss both structure AND function. Describe AT LEAST TWO (2) similarities and AT LEAST THREE (3) differences.

Which of the following statements accurately describes glycolysis? Multiple Choice 1. Glycolysis uses no molecular oxygen and occurs in the mitochondria. 2. Glycolysis uses molecular oxygen; however, it occurs in anaerobic environments. 3. Glycolysis uses no molecular oxygen; however, it can occur in aerobic environments. 4. Glycolysis uses molecular oxygen and occurs in aerobic environments. < Prev 38 of 50 Next >

Multiple Cholce Question Which aspect of antibiotic resistance development in microbes is depicted in this image? Antibiotics cause individuals to mutate as antibiotic material is inserted into bacterial cells. Random genetic mutations create antibiotic-resistant individuals that survive and multiply to develop into an antibiotic-resistant colony. Conjugation among different types of bacteria creates mutatedresistant genes spreading antibiotic resistance within a colony.

Question 4 1 pts As grapes ripen: The acidity level and the sugar level both drop The acidity level and the sugar level both increase The acidity level increases and the sugar level drops The acidity level drops and the sugar level increases

The assessment technique that will vary the most due to human error is height to waist to height ratio

Basal bodies

Question 7 fats are found in partially hydrogenated vegetable oils. Saturated Trans fats Unsaturated Question 8 Saturated fats and trans fats should be limited in our diet. True False Question 9 Unsaturated fats are good for you. Which food listed has primarily unsaturated fat? Eggs Bacon

If involution of the animal pole cells in the frog did not occur in gastrulation what would be the consequence? ectoderm would not form properly blastocoel would be destroyed archenteron would not form mesoderm would not form properly

In a population where allele frequencies were initially measured as 50% A and 50% a, subsequent measurements taken many generations later reveal the same frequencies of 50% A and 50% a. What is the most likely explanation for this outcome? - Genetic drift caused a change in allele frequencies. - The population is in a state of genetic equilibrium. - Selective pressures led to a shift in allele frequencies. - Mutations introduced new alleles into the population. - None of these is correct.

An allele refers to alternative versions of a gene that codes for the same trait (for example: eye shape). True False

What is the total magnification of a specimen using the 40 X objective?

Question 15 (2.5 points) If the respiratory system fails, which other body systems will eventually fail? - Circulatory and digestive - Circulatory, nervous, and digestive - All body systems - Genitourinary, nervous, and musculoskeletal

Bone growth in which the bone increases in diameter is called

Foods rich in vitamin C generally include: - citrus fruits

How is water different from saline in terms of its tonicity? In this scenario, what effect on the residual malignant cells is the surgeon trying to achieve by use of the sterile water? Compare and contrast the osmotic reactions that occur between eukaryotic and prokaryotic cells when placed in hypertonic or hypotonic solutions. Discuss the other differences between eukaryotic cells and prokaryotic cells.

The table below shows the results of a survey that asked 1056 adults from a certain country if they favored or opposed a tax to fund education. A person is selected at random. Complete parts (a) through (c). - Support Oppose Unsure Total Males 151 323 11 485 Females 245 302 24 571 Total 396 625 35 1056 (a) Find the probability that the person opposed the tax or is female. P (opposed the tax or is female) = .847 (Round to the nearest thousandth as needed.) (b) Find the probability that the person supports the tax or is male. P (supports the tax or is male) = .691 (Round to the nearest thousandth as needed.) (c) Find the probability that the person is not unsure or is female. P (is not unsure or is female) = (Round to the nearest thousandth as needed.)

What shape is the humerus? Short Flat Irregular Long

Which statement correctly describes the origin of lymph fluid? Lymph is secreted into the lymph vessels. Lymph is fluid collected from arteriovenous anastomoses. Lymph is excess tissue fluid formed from plasma that has leaked from capillaries Lymph is collected from fluid that accumulates in veins as blood slowly circulates back toward the heart. Submit Request Answer

Review Transcription produces which of the following? mRNA rRNA tRNA mRNA and tRNA mRNA and rRNA mRNA, tRNA, and rRNA are all produced by transcription. Submit Request Answer Part B

A survey at Pizza Hut showed that 53 people like sausage pizza, 29 people like Hawaiian pizza, and 14 people like both sausage pizza and Hawaiian pizza. How many people like either sausage pizza or Hawaiian pizza? 82 96 68 67

The talus, calcaneus, navicular, cuboid, and lateral, intermediate, and cuneiform bones are all part of the foot.

Osteoblasts are , whereas osteocytes are Multiple Choice bone-forming cells; bone-dissolving cells bone-forming cells; mature bone cells mature bone cells; bone-forming cells bone-dissolving cells; mature bone cells

Atom Cell Tissue Organ Organ system Organism

UV radiation is used extensively to destroy microbes in the air, drinking water, food items

A eukaryotic cell contains many compartmentalized organelles that organize its interior. Each organelle is a discrete unit surrounded by a membrane and has a specialized function. Other structures, such as ribosomes or the cytoskeleton, are not surrounded by a membrane. The generalized animal cell shown is colored so that the features can easily be distinguished from each other. Label each structure with its function. Choose the best answer for each structure. protein transport out of cell

Which is a small, membrane-bound sac that functions in storage and transport within a cell? a vesicle a peroxisome the endoplasmic reticulum a ribosome

Select the phrases that describe the plasma membrane. - creates a barrier between the inside and outside of the cell - maintains the correct ion concentration inside the cell

Endotoxin Multiple Choice determines bacterial shape. is found in Gram-positive cells. is toxic due to the effects of the peptide side chains. consists of lipopolysaccharide. may have different effects depending on the bacterial species.

The sample space listing the eight simple events that are possible when a couple has three children is bbb, bbg, bgb, bgg, gbb, gbg, ggb, ggg. After identifying the sample space for a couple having four children, find the probability of getting four girls and no boys. Identify the sample space for a couple having four children.

This tissue is found in areas subject to friction, such as the mouth or skin surface: pseudostratified stratified squamous simple squamous transitional simple columnar

Match the step of viral replication on the left with what is happening during that stage on the right. (i) Instructions attachment penetration synthesis assembly release new viruses depart from the host cell host cell produces viral nucleic acids and proteins new viruses are put together from newly produced protein coats and nucleic acids viral nucleic acid released inside host cell virus binds to cell surface

Question 12 Which of the following would most likely increase the demand for peanut butter? a decrease in the price of jelly, a good that is often used with peanut butter the discovery that excessive consumption of peanut butter is harmful to one's health crop failures that raise the price of peanuts the invention of a new product that consumers think is a good substitute for peanut butter Question 13

Identify the highlighted bone.

Select all that apply Not all mRNA molecules are equally stable; select all of the ways that this can affect gene regulation. The protein that an mRNA encodes may be destroyed. An mRNA molecule may be degraded before it is translated. An mRNA molecule may be degraded before it is transcribed. An mRNA molecule may persist long enough to be translated many times.

Standard Deviation Question 14, 5.4.13-T HW Score: 31.43%, 165 of 525 points Save Part 2 of 3 Points: 0 of 15 A livestock cooperative reports that the mean weight of yearling Angus steers is 1123 pounds. Suppose that the weights of all such animals can be described by a Normal model with a standard deviation of 95 pounds. a) What percent of steers weigh over 1050 pounds? b) What percent of steers weigh under 1200 pounds? c) What percent of steers weigh between 950 and 1100 pounds? a) 77.9% of steers have weights above 1050 pounds. (Round to one decimal place as needed.) b) % of steers have weights below 1200 pounds. (Round to one decimal place as needed.)

Which layer of the epidermis is found only on the palms of the hands and the soles of the feet? stratum corneum stratum lucidum stratum basale stratum spinosum

The nurse is caring for a 5 -year-old child in the outpatient clinic. The mother reports that the child attends a daycare facility four days out of the week and that recently a message was sent home that a child in the group had been diagnosed with the flu. The mother reports the child feeling "hot and cold," and complaining of a headache and a sore throat for approximately two days prior to this visit. Taking into account the child's most likely exposure to the influenza virus, as well as being diagnosed with uncomplicated influenza, when will the child most likely begin to experience symptom improvement?

QUESTION 5 What can be said about an animal that has the genotype BB? Select all that apply. They have two recessive variants of the gene. 100% of their offspring will inherit the dominant form of the gene. They are homozygous for this gene. The phenotype will be the trait associated with the recessive allele. QUESTION 6 What term describes an allele that is displayed phenotypically only if an individual has two copies of the allele? heterozygous recessive dominant homozygous

Multiple Choice Question Gene expression is the production of an RNA molecule or protein. a lipid or nucleic acid. a carbohydrate or protein. a protein or DNA molecule.

A lily (a monocot) would have vascular tissue arranged in a ring. flower parts in threes. two cotyledons. netted leaf veins.

A(n) is the DNA of a bacteriophage virus that is inserted into the host chromosome during lysogenic infection. - capsule - polysome - prophage - envelope

Hide Question 8 of 10 A deoxyribose linked to a thymine is referred to as a: purine nucleotide. nucleotide. purine nucleoside. nucleotide or purine nucleotide. nucleoside.

What is the meaning of the prefix in the term triceps brachii? Multiple Choice laceration avulsion fracture muscle three

The genes present on the chromosome are the and the actual bodily traits and characteristics that we see are the

Select the correct name Elastic Cartilage Connective Tissue of this tissue, and [Select] in this tissue.

Select the correct name of this tissue, and what is the name of the cell at the pointer.

What level of protein structure is shown in the picture? Quaternary Primary Tertiary Secondary

5'-GAATCC-3' 3'-CTTAGG-5' 5'-CCTTCC-3' 3'-GCAAGG-5' 5'-AGGTCC-3' 3'-TCCAGG-5' 5'-GGATCE-3' 3'-CCTAGG: 5'

Dermis 1. : Subcutaneous fatty layer Hypodermis Epidermis 2. : Contains sensory receptors, blood vessels, and nerves 3. : Protective outer layer

The primary dye in the Gram stain is: - Gram's iodine - crystal violet - ethyl alcohol (ethanol) - safranin

The reverse of endocytosis is

The two main categories of square square are endocytosis and exocytosis.

Which of the following is a metabolic function of skin? elimination of nitrogenous wastes cutaneous sensation body temperature regulation synthesis of a vitamin D precursor

Question 5 1 pts Indicate the way in which alcohol affects bacterial cells. It coagulates proteins. Oxidation It causes mutations. It disrupts peptidoglycan.

Which radioisotope is used to treat leukemia and lymphomas? A) Xenon-133 B) Phosphorus-32 C) Iridium-192 D) Thallium-201

Which type of cell or cellular structure is not found in the epidermis? pain receptors dendritic cells keratinocytes melanocytes

HW: Chapter 7 (i) Label the components in this image showing transcription.

Question 18 1 pts You are scrolling through a news app and stop to read an article that says flu season is here and that it will be particularly bad this year. After reading the article, you immediately head out to buy a pack of disposable masks and some hand sanitizer. The particularly bad flu season has a behavior-altering abative effect on having masks and hand sanitizer. behavior-altering evocative effect on having masks and hand sanitizer. value-altering abolishing effect on having masks and hand sanitizer. value-altering establishing effect on having masks and hand sanitizer.

What contains about 6.4 billion base pairs and about 20,000 genes? O The human genome O A nucleotide O A transfer RNA molecule O A eukaryotic chromosome

Giving a test to a group of students, the table below summarizes the grade earned by gender. A B C Total ----------------------- Male 12 9 16 37 Female 10 6 13 29 Total 22 15 29 66 If one student is chosen at random, find the probability that the student is female given the student earned grade A. Round your answer to four decimal places.

The roots of a plant reach down 3 3/4 inches below ground. How many inches is the plant above the ground?

The structure that easily distinguishes a plant cell from an animal cell is Multiple Choice mitochondria. the nucleus. the plasma membrane the Golgi apparatus. chloroplasts.

The term tonicity refers to the effect of a solution on the translocation of water into or out of cells.

Identify and name the parent in each of the following compounds:

The flow of blood into the heart Blood from the systemic circuit enters the heart and flows into the before being pumped into the lungs Multiple Choice left atrium, and then right ventricle right atrium, and then right ventricle left atrium, and then right atrium right atrium, and then left atrium

identify the main procedures involved in a western blot and the correct order in which they are performed.

Theoretically, a protein could assume a virtually infinite number of configurations and conformations. Which of the following features of proteins drastically limit the actual number of available conformations and configurations? (Select all that apply.) - Only L-amino acids (except for glycine) are used in proteins. - The tertiary structure of a protein is controlled by hydrophobic interactions between nonpolar amino acid residues. - Although any one of 20 amino acids is possible at each position, only one is used. - The Ramachandran angles φ and ψ are limited in their values due to steric restrictions. - The partial double bond character of the α-C-N bond in the peptide group limits the conformations of the peptide group.

The folds of the inner mitochondrial membrane are called.

Question 1 0.25 pts What can put pressure on other faults and trigger them to become active? Volcanic eruptions Landslides Tsunamis Earthquakes

(6) Organic compound consisting of a fivecarbon sugar, a phosphate group and a nitrogenous base (7) The basic functional units of the human body (8) The term that describes reactions that result in input of energy to synthesize large molecules in the body (9) Formation of glycogen from glucose (10) Breakdown of glycogen to release glucose-1-phosphate

Which of the following are considered to be bonebuilding cells? fibroblasts osteoclasts osteoblasts osteocyte

Cilia are composed of microtubules. How are microtubules different from the other cytoskeletal filaments? Microtubules are large bundles composed of the protein myosin. They are generally 15 nanometers in size. Microtubules are hollow tubes with a diameter of 25 nanometers and are composed of the protein tubulin. Microtubules are the smallest cytoskeletal element with a diameter of 5 nanometers, and they are composed of the protein actin. Microtubules vary in size from 9 to 11 nanometers and have different protein compositions depending upon the type of cell.

Multiple Choice Question Which principle of relative dating can be used to determine when the minerals associated with the granite intrusion in the diagram formed? Cross-cutting relations Superposition Original horizontality Inclusions

An average of many different studies of handedness indicate that in a random sample of adults, 14 percent of men are left-handed and 6 percent of women are left-handed. (Assume the rest are right-handed.) Suppose you have a sample of 250 women and 200 men, in which the numbers of left-handed and right-handed people reflect the average percentages. Make a two-way table that shows the distribution you would find. Fill out the two-way table below. Women Men -------------------------- Right-Handed Left-Handed (Simplify your answers.)

Superior vena cava

Question 1 How many deer are heterozygous for both tail length and spots genes? 4 6 5 3

Which of the following information provides the strongest evidence to support the evolutionary relatedness between fungi and animals? Multiple Choice Both are heterotrophic. They both possess a cell wall made of chitin. Some fungi and animals have flagella. Molecular data shows a similarity in DNA/RNA base sequences.

Which of the following will result when 1% to 5% agar is added to nutrient broth, boiled, and cooled?

By observing the scattering of alpha particles from gold foil, Rutherford determined that atoms have: a dense positively charged core. positive charges distributed approximately evenly throughout the atom. wave-like particles of very small dimensions. different isotopes having different masses. none of these. Question 5 (1 point) How many protons, neutrons, and electrons are in a silver atom with a mass number of 108 ? 13 61 protons, 108 neutrons, 61 electrons 47 protons, 108 neutrons, 47 electrons 61 protons, 47 neutrons, 47 electrons 47 protons, 61 neutrons, 47 electrons 47 protons, 47 neutrons 61 electrons

Part A In which quadrant of the abdominopelvic cavity is the stomach located? left lower quadrant left upper quadrant right upper quadrant right lower quadrant

All of the following are lipids except . cholesterol triglyceride phospholipid wax starch

In the knee joint, the femur articulates with the □ and the patella.

QUESTION 10/32 The plasma membrane is *NOT* part of the endomembrane system. True False

An investigator wants to determine if ear bud use is a causative agent for hearing loss. She examines a group of people with hearing loss and a group of people with no hearing loss and asks them both about their history of ear bud use. In this study, ear bud use is the: Outcome (dependent) variable B. Hypothesis C. Descriptor D. Predictor (independent) variable

MATCHING (Each worth 1/2 point) Use the answer choices in the box on the right for this portion of the quiz. Each choice will only be used once but not all choices will be used. Choose the BEST answer. 1. The amount of blood in each ventricle at the end of ventricular diastole 2. The amount of blood remaining in each ventricle at the end of ventricular systole 3. The percent of the EDV represented by SV 4. This equals HR * SV 5. The amount of blood pumped out of each ventricle during a single contraction 6. This is the degree of stretching experienced by ventricular muscle cells during ventricular diastole 7. This is the force produced during a contraction at a given preload 8. This is the normal value for SV Cardiac Function Calculations: Show your work (including the equations that you use). 9. What is the average value for cardiac output at rest? L/min. Do you think CO would change with exercise? How? Why?

- Growth rate slows following infancy. - MyPlate.gov is a food guidance system that offers an Internet-based tool to provide clients with individualized recommendations for adequate nutrition. Children require the same food groups as adults, but in smaller serving sizes. - Energy needs and appetite vary with the child's activity level and growth rate. - Generally, nutrient needs increase with age. - Attitudes toward food and general food habits are established by 5 years of age. - Increasing the variety and texture of foods helps the child develop good eating habits. - Foods like hot dogs, popcorn, peanuts, grapes, raw carrots, celery, peanut butter, tough meat, and candy can cause choking or aspiration. - Inclusion in family mealtime is important for social development. - Group eating becomes a significant means of socialization for school-age children. TODDLERS: 1 TO 3 YEARS OLD NUTRITION GUIDELINES - Toddlers generally grow 2 to 3 inches in height and gain approximately 5 to 6 lb/year. - Limit 100% juice to 4 to 6 oz a day. - The 1- to 2-year-old child requires whole cow's milk to provide adequate fat for the still-growing brain. - Food serving size is 1 tbsp for each year of age. - Exposure to a new food might be needed 15 to 20 times before the child develops an acceptance of it. - If there is a negative family history for allergies, cow's milk, chocolate, citrus fruits, egg white, seafood, and nut butters can be gradually introduced while monitoring the child for reactions. - Toddlers prefer finger foods because of their increasing autonomy. They prefer plain foods to mixtures, but usually like macaroni and cheese, spaghetti, and pizza. - Regular meal times and nutritious snacks best meet nutrient needs. - Snacks or desserts that are high in sugar, fat, or sodium should be avoided. - Children are at an increased risk for choking until 4 years of age. - Avoid foods that are potential choking hazards. Always provide adult supervision during snack and mealtimes. During food preparation, cut small, bite-sized pieces that are easy to swallow to prevent choking. Do not allow the child to engage in drinking or eating during play activities or while lying down.

Which epithelial type is highlighted? simple squamous epithelium simple cuboidal epithelium simple columnar epithelium pseudostratified columnar epithelium

Interactive Assignments: Chapter 7 17 Select the correct word from each drop-down box to complete the statement. The streptococcus causes infections in the throat. First blank - bacterium Second blank - bacterial

Drag the tiles to the correct boxes to complete the pairs. Match the digestive organs with their functions. pancreas small intestine mouth large intestine liver stomach moistening and mechanical digestion of food aiding in chemical digestion of fats chemical digestion and absorption of nutrients mechanical and chemical digestion of food with acids and enzymes absorption of water and compaction of indigestible material for elimination secreting the enzymes lipase, trypsin, and amylase Reset Next

The infectious agents that cause Rocky Mountain spotted fever and epidemic typhus are transmitted to the human body via vector such as a tick. What are these infectious agents? O Ehrlichia O Rickettsia O Chlamydiae O Viruses

An elevated ridge of the cortex is called a fissure sulcus furrow gyrus

Lecture Notes Handout: Skeletal Muscle Properties (Part II) Tendon and Ligament Properties Overview 1. Tendon connect to 2. Ligaments connect to

(a) Let t be the time (in days) since the beginning of the study, and let y be the number of bacteria at time t. Write a formula relating y to t. Use exact expressions to fill in the missing parts of the formula. Do not use approximations. y=20 e^(ln 13/52 t) (b) How many bacteria are there 17 days after the beginning of the study? Do not round any intermediate computations, and round your answer to the nearest whole number. bacteria

A primary deficiency occurs when the body is unable to use the nutrients consumed efficiently.

Which epithelial tissue is found in the kidney tubules, ducts of small glands, ovary surface, and thyroid follicles? Simple columnar Stratified squamous Transitional Pseudostratified columnar Simple cuboidal

The first stage of the diploid generation is the zygote gametophyte gamete sporophyte

All viruses are composed of at least nucleic acid covered by a coating comprised of

A renal corpuscle is a ?, whereas a renal tubule is a ?. A special blood cell in the kidneys; tubule that leads from the kidneys to the bladder (B) glandular structure that regulates blood pressure; blood vessel that regulates the flow of blood into the glomerulus (C) storage area for urine; tubule that carries urine from the urinary bladder outside (D) structure composed of connective tissue; blood vessel (E) cluster of blood capillaries and glomerular capsule; highly coiled tubule exiting the glomerular capsule

Which of the following is described as any decrease in the oxygen-carrying ability of the red blood cells? tachycardia syncope dyspnea anemia

Which muscle type, through involuntary control, helps to expel urine from the bladder and feces from the digestive tract? Multiple Choice Skeletal muscle Cardiac muscle Smooth muscle

Question 10 1 pts The value of evidence is directly affected by what happens immediately following the crime. Evidence in an unprotected crime scene will degrade, diminish, or disappear over time unless collected and preserved. occurs when items touch one another? contamination cross contamination exposure decontamination Question 11 1 pts As it relates to evidence - extremely small items such as hair or fibers, are a subset of direct evidence called? Trace evidence

What is the oxidation number for alkali metal ions?

Rank the following processes by the amount of adenosine triphosphate (ATP) produced per substrate, from most ATP to least. Krebs cycle (from one Acetyl-CoA) Fermentation (from one pyruvate) Glycolysis (from one glucose) Electron Transport Chain

Question 18 1 pts Please match the mitotic stage to what is occurring during that stage Interphase [Choose] Prophase [ Choose ] Metaphase [Choose] Anaphase [Choose] Telophase [Choose]

Which of the following is a problem created when a cell becomes too large? DNA is not able to coordinate activities of a very large cell properly.

A supernova called SN 1987A was visible to the naked eye in the night sky in . It occurred in the Large Magellanic Cloud.

Adhesins are molecules on the surface of some microorganisms allowing them to bind to receptor sites on host cells before they infect them. This is considered a of a pathogen. Infection factor Gateway Virulence factor

How many ATP molecules are produced from the complete catabolism of 4 molecules of glycerol, HOCH2 CH(OH) CH2 OH? ATP molecule(s)

In the nervous system, which of the following is true of neurons and the neurotransmitters they secrete? Most neurons secrete many neurotransmitters at the same time. At any given time, a neuron is receiving a mixture of messages from the neurotransmitters. Neurotransmitters are located in the nuclei of the neurons. Neurotransmitters in neurons cannot be both excitatory and inhibitory.

B Canvas Unit 3 Canvas Quiz - Requires Respondus LockDown Browser Started: Sep 20 at 12:35pm Quiz Instructions Question 6 The cell structures responsible for membrane transport are proteins. carbohydrates. steroids. phospholipids. Quiz saved at 12

Movement that brings the foot and toes farther from the shin is of the ankle joint. Multiple Choice rotation dorsiflexion hyperextension plantar flexion

An adult with a healthy sleep cycle is most likely to enter REM sleep in which of the following ways? (A) immediately after falling asleep (B) after the dream stage is completed (C) after cycling through the NREM sleep stages (D) soon after falling asleep and then remain there for the majority of the night

If you think of a cell as a factory that makes proteins and ships them out, which function would the nucleus perform? Power plant-provides energy to the factory Workfloor - space where work in the factory is performed Management - makes decisions about what product (protein) to make Security fence with gates - controls whats get in and out Assembly line workers - makes product (protein)

m APR material: Cellular metabolism and transport across membranes Previous Page Next Page Page 35 of 49 Question 35 (1 point) Listen How is a polypeptide chain synthesized? a) Amino acids are bound together in a long specified sequence. b) MRNA that is bound to an amino acid, such as tyrosine, associates with a ribosomal subunit. c) Ribosomal subunits bind to a long strand of tRNA molecules. d) Nucleotides are bound together in a long specified sequence. Previous Page Next Page Page 35 of 49 9 MacBook Air

In DNA replication, pairs with thymine, and cytosine pairs with Multiple Choice purine, alanine adenine; guanine cytosine; thymine None of the answer choices are correct. guanine; adenine

Cal studies the effects of a new vaccine and designs an experiment with two groups. Group A gets the vaccine and Group B gets a placebo shot. Which of the following would be the null hypothesis in Cal's experiment? Group A and Group B are both less likely to contract the virus. Group A and Group B are equally likely to contract the virus. Group B is less likely to contract the virus compared to Group A. Group A is less likely to contract the virus compared to Group B.

14) Which of the following is true of natural selection? A) It requires genetic variation. B) It involves differential reproductive success. C) It requires genetic variation, results in descent with modification, and involves differential reproductive success. D) It results in descent with modification.

5) Why does ice float in liquid water? A) The crystalline lattice of ice causes it to be denser than liquid water. B) Stable hydrogen bonds keep water molecules of ice farther apart than water molecules of liquid wate C) The high surface tension of liquid water keeps the ice on top. D) The ionic bonds between the molecules in ice prevent the ice from sinking.

Which correctly lists the three parts of soil that are classified by their particle size? bedrock, humus, and clay clay, bedrock, and silt humus, sand, and clay sand, clay, and silt

From the following list, select the function that is NOT associated with the skin. temperature regulation protection against microbes synthesis of vitamin E protective barrier against water loss sensory input

2. What element is the building block for most biological molecules? What makes it so versatile?

Question 17 (1 point) Professor Cook is lecturing on the importance of the myelin sheath. He told the class that - a) myelin is the only structure that can prevent action potentials from traveling the wrong direction. b) the fatty nature of the myelin speeds up the action potential down the length of the axon c) the fatty nature of myelin provides storage for key nutrients for the neuron d) myelin increases the strength of the action potential

QUESTION 14 Collagen gives and tensile strength to the skin. Water resistance UV protection Color Elasticity Structure

Mucous membrane Serous membrane Synovial membrane Consists of a layer of epithelial cells, a basement membrane and a lamina propria Consists of a mesothelium, a basement membrane and loose connective tissue Consists of only connective tissue

Which of the following forces does not help lymph to flow? a. Arterial pulsations squeezing lymphatic vessels b. The thoracic pump c. Rhythmic contractions of lymphatic vessels d. The lymphatic node pump e. The skeletal muscle pump

Drag and drop to match the best description of tertiary structure found in each type of biomolecule. None formally recognized Folding into specific shapes stabilized by hydrogen bonds Sequences of sugars joined by glycosidic linkages. Supercoiling (twisting on itself, occurs in some cases) α-helices and β-pleated sheets stabilized by hydrogen bonds. Folding into specific shapes stabilized by ionic bonds, hydrogen bonds, S-S bonds, and/or hydrophobic interactions. Several protein subunits assembled into a single unit stabilized by ionic bonds, hydrogen bonds, S-S bonds, and/or hydrophobic interactions.

Select the microbial characteristics that can be observed through staining and microscopy. morphology gram reaction arrangement size

The most important biological contribution of carbon dioxide to the atmosphere is through a) microbial decomposition of dead material b) burning organic material c) respiration from the lungs

Plants must open their to let in the carbon dioxide that is required for photosynthesis. stroma stomata mesophyll

Where does the urea produced in the urea cycle get eliminated from the body?

Select the correct answer from each drop-down menu Complete the following sentences to correctly explain how life could have formed on Earth. According to one hypothesis, life on Earth emerged from amino acids in the presence of large amounts of gases seeping from deep-ocean vents. Another hypothesis, called the primordial soup, suggests that the formation of life was due to the effects of in Earth's atmosphere.

A nuclear pore is best described as an opening in the that permits the passage of molecules into and out of the nucleus. nuclear envelope plasma membrane endoplasmic reticulum nucleolus

The double membrane that separates the nucleus from the cytoplasm is known as the

Blood coagulation is a process that requires clotting factors, platelets and vitamin - calcium; K calcium; D sodium; B potassium; C

Question 18 During the process of fermentation: Yeast converts the water in grape juice into alcohol Yeast converts the excess alcohol in wine into sugar and acids Yeast converts the acid in grape juice into alcohol Yeast converts the sugar in grape juice into alcohol

hemothorax

If the plasma of a blood sample contains the anti-B and not the anti-A antibodies, the ABO blood type is B A 0 AB

What unit of measure is most appropriate for expressing the size of bacteria? Multiple Choice micrometer nanometer milimeter picometer

The mineral chalcocite, Cu2S, has been mined for centuries and is one of the most profitable copper ores because of its high copper content. How many grams of chalcocite must be mined to obtain 312 g of pure Cu? Express your answer in grams to 3 significant figures. mass of chalcocite = g

What percentage of the body weight is made of oxygen? Less than 50% More than 50%

What genus causes malaria? Plasmodium Trichomonas Entamoeba Trypanosoma Toxoplasma

Multiple Choice Question Which of the following is NOT an example of nonmaterial culture? - classical music - a college education - the English language - a car

Evaluate the limit as x approaches 0 of (x^100 + 7x^2) / (x^50 - 4x^2)

When a man observed a sobriety checkpoint conducted by a police department, he saw 667 drivers were screened and 4 were arrested for driving while intoxicated. Based on those results, we can estimate that P(W)=0.00600, where W denotes the event of screening a driver and getting someone who is intoxicated. What does P(W̅) denote, and what is its value? What does P(W̅) represent? A. P(W̅) denotes the probability of a driver passing through the sobriety checkpoint. B. P(W̅) denotes the probability of screening a driver and finding that he or she is intoxicated. C. P(W̅) denotes the probability of driver being intoxicated. D. P(W̅) denotes the probability of screening a driver and finding that he or she is not intoxicated. P(W̅)= (Round to five decimal places as needed.)

The formula of copper (I) sulfide is: Cu3(SO3)2 Cu2S CuS Cu2SO3 None of these Cu2(SO3)3 CuS2 CuSO3

What does tissue tropism refer to? The specificity of the virus for certain types of cell within the tissue of the host

ACTIVIDAD PREVIA: Indique el nombre de cada componente destacado con señaladores. Observe las formas de los núcleos en 1, 2 y 3 , e indique qué forma deberías tener esas células Emplee este espacio para desarrollar la actividad

Question 7 ( 0.52 points) Humoral immunity is brought about by antibodies, which are produced by plasma cells 1) True 2) False

Information about movement, posture, and orientation is provided via the senses. kinesthetic vestibular tactile olfactory

Name the oily component of the secretion of the sebaceous glands. Ammonia Glucose Sodium chloride Water Sebum Need help? Review these concept resources.

Multiple Choice Question Which is the main role of proteins in cells? Long term energy molecules. Contain genetic information. Structural and functional molecules. Quick energy source for the cell. Need help? Review these concept resources.

Which of the following organelles sorts, cuts, splices, and packages newly formed proteins into membrane-bound vesicles? Multiple Choice Mitochondrion Golgi complex Nucleolus Smooth ER Rough ER

Consider the different types of metabolic pathways. Which of the following is a metabolic pathway that involves the same set of reactions repeated on increasingly smaller substrates? Select the single best answer. cyclic chain spiral linear Which of the following is a spiral pathway? Select the single best answer. glycolysis pyruvate oxidation the citric acid cycle B-oxidation of fatty acids gluconeogenesis

The non-dividing phase of the cell cycle

Where are cartilaginous joints commonly found?

Which of the following are energy storage carbohydrates? (check all that apply) Triglyceride Starch Phospholipid Chitin Cellulose Glycogen

A muscle that opposes, or reverses, a particular movement is a (n) antagonist synergist fixator agonist (prime mover)

During anaphase, what changes take place with chromatids? (1 point) The chromatids are pulled towards different centromeres. The chromatids are pulled towards different centrioles. The chromatids are pulled towards the same centriole. The chromatids are pulled towards the same centromere.

Match the representative example of each fungal group to the characteristics of that group. 1. Chytrids Primitive fungi which have flagellated spores. 2. Ciyptococcus neoformans 3. Penicillium 4. Rhizopus Fungi with incompletely septate hyphae that commonly have fleshy fruiting bodies. The hyphae of these fungi are usually nonseptate but if they are septate, the septa are complete. These fungi have hyphae with porous septa. Primitive fungi which have flagellated spores.

Matching Question Identify the components of the portion of the plasma membrane depicted in this illustration. Peripheral protein Glycoprotein Phospholipid

Food Chain - Is a representation which shows the flow of energy from one organism to another - Includes the following levels: - producers - primary consumers - secondary consumers - tertiary consumers - predators - decomposers and detritivores

onsider a protein that is targeted to be excreted to the outside of the plasma membrane. There would this protein be located in the Golgi? in the lumen (inside) of the Golgi embedded as an integral membrane protein in the Golgi membrane outside the Golgi as a peripheral membrane protein

Organisms that feed on dead organisms for nutrients are called Multiple Choice parasites. phototrophs. saprobes. autotrophs. lithoautotrophs.

Biology

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