Biology Homework Questions & Answers Archive

How many O2 molecules are required per glucose molecule during aerobic respiration?

A power stroke involves an actin molecule pulling a myosin molecule toward the M-line. a myosin head pulling a thin filament toward the center of the sarcomere. a thick filament pushing an actin filament towards the nearest I band. a thin filament shortening in length and thereby shortening the sarcomere.

The molecule shown in the picture is a sugar-phosphate backbone. phospholipid. triglyceride. glycoprotein.

Part A For a species with a haploid number of 23 chromosomes, how many different combinations of maternal and paternal chromosomes are possible for the gametes based on the independent assortment of chromosomes during meiosis? 46 about 8 million 23 about 1,000 Submit Request Answer Provide Feedback Next ）

1. Move your leg away from the midline of your body. This motion is (abduction/adduction). 2. Muscle disease may be assessed by (myelography/myography). 3. Plantar (fascial/facial) pain can be caused by flat feet. 4. The (fascial/facial) muscles can wrinkle the forehead and pucker the lips. 5. Bob cannot bend his wrist because the (flexor/flexure) muscles were damaged in a motorcycle accident. 6. Debra tore the (peroneal/peritoneal/perineal) area when she delivered her baby. 7. The (peroneal/peritoneal/perineal) cavity in the abdomen was filled with fluid. 8. The (peroneal/peritoneal/perineal) muscle is responsible for abduction of the foot.

Question 8 All of the following are granulocytes except neutrophils. eosinophils. lymphocytes. basophils.

Which portion of the neuron recelves information? (A) Dendrites (B) Axon (C) Soma (D) Myelin

Which layer of tissue separates or divides the testes into lobules? - Tunica vaginalis - Tunica albuginea - Dartos - Superficial fascia Which of the following statements concerning the menstrual cycle is TRUE? - The corpus luteum will eventually decay into the corpus albicans if the female is not pregnant - Progesterone released from the developing follicle during the pre-ovulatory phase is responsible for the development of the stratum functionalis - hCG from the follicle keeps the corpus luteum alive when the female is pregnant - Both A C - All of the above

Identify the structure at the tip of the pointer.

have a closed circulatory system. Flies Fish Shrimp

QUESTION 26 Figure 17.2C Heart: frontal section. In Figure 17.2C, identify number 10. A. Endocardium B. Trabeculae carneae C. Chordae tendinae D. Visceral pericardium (epicardium) E. Myocardium F. Mitral valve G. Pectinate muscle

Question 20 2 pts Which is not an age-related change to the immune system? B cell production decreases number of dendritic cells decreases macrocyte function is decreased skin becomes thicker

Remembering what you did on the first day of high school is an example of memory.

"Tax cuts, by providing incentives to work, save, and invest, will raise employment and lower the price level." This argument is made by the: monetarists. classical economists. Keynesian economists. supply-side economists.

True or False and provide your rationale for your answer: The filtration process occurs across the filtration membrane which includes three layers: proximal convoluted tubules, loop of Henle, and collecting ducts.

Both involve the kidneys. Both are carried out by the urinary system. Both eliminate waste from the body. Both are carried out by the digestive system. Both involve the colon.

The phrase "sampling error" means that you have made a mistake counting the genotypes all genotypes have fitness you have a small, unrepresentative sample of a larger population. a lot of the genetic drift to be expected in a small population has disappeared because of a catastrophe.

Question 17 of 20 Which of the following is not one of the possible side effects of pollution intake? A. Chest tightness B. Fatigue C. Muscle cramps D. Sore throat and coughing SUBMIT ～PREVIOUS

Arrange the steps of DNA replication in the order that they occur. First step Last step Answer Bank DNA ligase joins DNA fragments together. DNA polymerase synthesizes DNA. Helicase unwinds the DNA double helix. RNA primers are added. RNA primers are removed. Single-stranded DNA-binding proteins bind to each template strand.

The degree to which a muscle cell can stretch depends on its: distensibility. contractility. excitability. conductivity.

Cortical cancers, such as Adenocarcinoma tend to invade the adrenal glands, IVC, and lymph nodes. a. False b. True

Insufficient vitamin D during adulthood is associated with kidney stones. osteomalacia. rickets. hypocalcemia.

Which of the following is NOT needed for petroleum formation? sedimentation time vegetation anaerobic conditions

Which of the following hormones is produced in the adrenal cortex? leptin melatonin cortisol norepinephrine

A biome is the complex living community maintained by climate of a region characterized by a distinctive vegetation. (A) True (B) False

Asthma is due to a(n) Multiple Choice All of the answers are correct. allergy. anxiety. infection.

Identify structure C.

Which anterior pituitary hormone stimulates the mammary glands to synthesize milk? - Prolactin - ACTH - TSH - Oxytocin

Which describes neuroendocrine cells? They respond only to chemical signals. They stimulate endocrine organs. They release their secretions into the bloodstream. They are found in the gut only.

True or False Question In strict aerobes and some anaerobes, pyruvic acid enters the Krebs cycle after it is converted to acetyl CoA. True False

At low concentrations of NADPH + H^+, excited electrons in photosystem I Select one: a. are passed to photosystem II. b. power ATP synthase. c. reduce coenzymes. d. create a pH gradient in the lumen.

Question 57 What protein provides flexibility and strength to connective tissues? keratin myosin actin collagen fibrinogen

How do CAM plants avoid water loss? CAM plants live only in moist, cool areas. CAM plants have a tap root, which replaces water as quickly as it is lost. CAM plants are succulents, so they contain such a high percentage of water that the sheer amount of water in the system prevents evaporation. CAM plants close their stomata during the day and open them at night.

Question 10 (1 point) The most frequent cause of sexually transmitted infections in the United States is hepatitis B herpes simplex virus type 2 human papillomavirus herpes simplex virus type 1 Question 11 (1 point) Scabies can be contracted through bedding skin-to-skin contact toilet seats clothing

Question 60 Food restriction may extend the lifespan by preventing: a, hormone synthesis. b. gene suppression. c. protein accumulation. d. lipid oxidation. e, insulin reduction. Moving to the next

Which of the following organisms have only one photosystem? Chloroplasts Most plants Most algae Anoxygenic bacteria

The beginning of ventricular systole is marked by the first heart sound, corresponding to the closing of the valves, and the beginning of ventricular diastole is marked by the second heart sound, corresponding to the closing of the valves.

Question 24 Which of the following is true regarding bile? A The liver produces bile (B) Gallstones can develop within the gallbladder due to decreased levels of cholesterol or bile salts in the bile (C) Bile is concentrated by the pancreas D Bile is needed to assist in the chemically digestion of fiber

Match each term to its definition Euploid Chromosome translocation Nondisjunction Monosomy X inactivation Trisomy Aneuploid Chromosome inversion Polyploid An individual with the appropriate number of chromos A segment of a chromosome dissociates and reattache The failure of homologous chromosomes or sister chrc Loss of one chromosome The process by which females compensate for having c Gain of an extraneous chromosome An individual with an error in chromosome number The detachment, 180 degree rotation, and reinsertion An individual with more than the correct number of ch

The number of ants per acre in the forest is normally distributed with mean 44,000 and standard deviation 12,019. Let X= number of ants in a randomly selected acre of the forest. Round all answers to 4 decimal places where possible. a. What is the distribution of X ? X ~ N( , , b. Find the probability that a randomly selected acre in the forest has fewer than 49,514 ants. 0.6768 c. Find the probability that a randomly selected acre has between 48,009 and 62,608 ants. 0.3086 d. Find the first quartile. ants (round your answer to a whole number)

How does a virus differ from a bacterium? Select all that apply. A virus, unlike a bacterium, lacks a genome. Viruses are two-dimensional, whereas bacteria are three-dimensional. Viruses, unlike bacteria, lack metabolic enzymes.

Arachnophobia: A 2005 Gallup Poll found that 7% of teenagers (ages 13 to 17) suffer from arachnophobia and are extremely afraid of spiders. At a summer camp, there are 10 teenagers sleeping in each tent. Assume that these 10 teenagers are independent of each other. (a) Calculate the probability that at least one of them suffers from arachnophobia. (b) Calculate the probability that exactly 2 of them suffer from arachnophobia. (c) Calculate the probability that at most 1 of them suffers from arachnophobia. (d) If the camp counselor wants to make sure no more than 1 teenager in each tent is afraid of spiders, does it seem reasonable for him to randomly assign teenagers to tents?

Androgens and estrogens are sex hormones produced by the adrenal cortex.

Question 35 2.5 P What city is located at the mouth of the Rio Grande? (A) Laredo B Corpus Christi (C) Brownsville (D) Houston

Activation of complement proteins lead to protective outcomes. lysis three many five

Select all that apply Across American adults, which of the following options are among the most popular dietary supplements that do not contain vitamins or minerals? Fish oil/omega-3* Green tea extract Probiotics and prebiotics Melatonin

A Canadian longitudinal study examined whether giving antibiotics in infancy increases the likelihood that the child will be overweight later in life. The study included 616 children and found that 438 of the children had received antibiotics during the first year of life. Test to see if this provides evidence that more than 70% of Canadian children receive antibiotics during the first year of life. Show all details of the hypothesis test, including hypotheses, the standardized test statistic, the p-value, the generic conclusion using a 5% significance level, and a conclusion in context. Clearly state the null and alternative hypotheses. Calculate the test statistic and p-value. Round your answer for the test statistic to two decimal places, and your answer for the p-value to three decimal places. What is the conclusion?

What is the purpose of the 1 kbp DNA ladder used in gel electrophoresis? to quantitatively measure the speed of DNA to qualitatively measure the length of DNA to qualitatively measure the intensity of the color of DNA to quantitatively measure the size of DNA

Question 14 1 Point "Which result is a normal PT/Protime result for a patient not on blood thinning medications? 101.9-120.9 seconds 17.9 - 30.8 seconds 20.4 - 20.7 seconds 10.4 - 15.7 seconds Question 15 1 Point Which of the following digits is the preferred site for a capillary puncture in an adult patient? Second Fourth First Fifth Question 16 1 Point

Midbrain Medulla oblongata Arbor vitae of the Cerebellum Sulci Corpus callosum Choriod plexus of the Fourth ventricle Thalamus Pons Hypothalamus Corpora quadrigemina Choriod plexus of the lateral ventricle Gyri

2 Multiple Choice 1 point Which of the following structures conencts the third ventricle to the fourth ventricle? Cerebral aqueduct Choriod plexus Interventricular foramen Falx cerebri

Some protists form long, foot-like projections of their cell membrane and cytoplasm that are used for movement and to capture food. What is the name of these structures? cilia flagella mycelia pseudopods

Which statement describes the relationship between illness and aging in older adulthood? Disease is an expected outcome of aging. Acute illness increases risk for chronic health conditions. Illness and disease seen in older adults are unique to this group. The strengthened immune system protects older adults against infectious disease.

Which of the following areas are not known to be sterile Brain Joints Vagina Blood

Organisms that produce a toxin and have the ability to invade cells are called

A white blood cell engulfing a bacterium is an example of blood functioning in maintenance communication transportation protection

For each of the images, label the phase of meiosis or cytokinesis, or list them by number below. 1. 5. 9. 2. 6. 10. 3. 7. 4. 8.

Question 2 0.5 pts Examine the highlighted cell and identify the phase of the cell cycle. Anaphase Interphase Telophase and cytokinesis Prophase Metaphase

How are the posterior pituitary and anterior pituitary similar? Both are connected to the hypothalamus via a portal system. Both produce hormones that control other glands. Both produce releasing and inhibiting hormones. Both produce three or more hormones. Both are controlled by the hypothalamus.

Choose the correct answer. Which of the following is the primary vector for Lyme Disease in the U.S.? (A) mosquitoes (B) dog tick (C) scabies (D) blacklegged tick

True or False Question Most skin cancer is caused by UV sun radiation which damages DNA. True False

Multiple Choice Question In this image, cells are illustrated as they would appear after each step of the Gram stain procedure. All cells appear the same color after the first step because the counterstain has not yet been applied first dye, crystal violet, stains all cells purple first dye, safranin, stains all cells purple staining procedure has been done incorrectly

Snapchat is an example of a Wi-Fi network. False True

How many hypothesized distinct types of crying does infant have? Two Three Four Five

is an enzyme that destroys bacteria by digesting their cell walls.

The leading and the lagging strands differ in that the leading strand is synthesized at twice the rate of the lagging strand. the lagging strand is synthesized continuously, whereas the leading strand is synthesized in short fragments that are ultimately stitched together. the leading strand is synthesized by adding nucleotides to the 3' end of the growing strand, and the lagging strand is synthesized by adding nucleotides to the 5' end. the leading strand is synthesized in the same direction as the movement of the replication fork, and the lagging strand is synthesized in the opposite direction.

Solve the following quadratic inequality: x^2 + 2x - 35 < 0 Write your answer in interval notation. Note: Use oo for ∞ and U for union

Identify the chloroplast.

Alcohol intake in smokers is strongly associated with cancers of the: stomach head and neck liver kidneys

You recently identified a molecule that you believe is a primary messenger for a signal transduction mechanism. All you know about this ligand is that it is hydrophilic. Where would you expect to find initial interaction of the molecule with its receptor? on the outer surface of the plasma membrane on the cytoplasmic side of the plasma membrane within the nucleus of the cell within the cytoplasm of the cell in endosome vesicles

20 Multiple Choice S. epidermidis, which produces the water-soluble pigments pyoverdine and pyocyanin. S. pyogenes, which produces a water-soluble blue-green capsule. P. aeruginosa, which produces multiple water-soluble pigments that are green. P. aeruginosa, which produces the water-soluble pigments pyoverdin and pyocyanin. either S. epidermidis or S. aureus, both of which produce pigments. A patient presents with a wound that contains green pus. This suggests to you that the wound is infected with

How does the binding of transcription factors to enhancers affect transcription at genes that are thousands of base pairs away? by blocking the effects of enhancers in a position-dependent manner the DNA between the enhancer and the promoter looping out having an inhibitory effect on the transcription of distant genes pausing or stalling downstream of the promoter

Question 3 Which of the following statements is true regarding the respiratory rate of a newborn? A The respiratory rate of a newborn is, at its highest rate, approximately 40-80 respirations per minute B The respiratory rate of a newborn is slow C The respiratory rate of a newborn varies between male and female infants D The respiratory rate of a newborn is approximately 30 respirations per minute

Which of the following is a uniquely female secondary sex characteristic? a.) Pubic hair b.) Enlarged Adam's apple c.) Widening of the hips d.) Armpit hair

This junction, called a square, is a plasma membrane-lined channel between plant cells.

A person receiving an antiserum injection develops acquired passive immunity, while a fetus receiving IgG in utero from the mother develops acquired passive immunity.

Damage to the circled area may lead to what behavioral symptom?

Identify two ways in which processed foods are typically less healthy than whole foods

Suppose there are 9 members of a rock band: 3 guitarists, 1 lead singer, 2 backup singers, 1 bass player, and 2 drummers. No one both sings and plays an instrument. A person is randomly selected from the band. Find the given probability in fraction form. P (a backup singer)

Which structure in the image is designated by the letter C? Capillary Bed Arteriovenous anastomosis Precapillary sphincter Thoroughfare channel

2. Find a specific example of something that happens during meiosis that would change mendels expected ratio of phenotypes in the next generation. Use in text citations

15 Multiple Choice 1 point How did microbial life on land contribute to the evolution of land plants? By increasing the formation of soil By producing oxygen through photosynthesis By forming symbiotic relationships with marine life By preventing soil erosion

Do you think that absorptive cells have additional structures that enhance the absorption in the small intestine? Make your assumption, and let's find out together! a) Yes, they have additional structures aiding the absorption b) No, the small intestine is complex enough to ensure maximum absorption

Red blood cells will undergo hemolysis in which solution? 1.0 % NaCl 0.3 % NaCl 5% glucose 5 % NaCl 10% glucose

A teacher says she has identified an organism with these characteristics: eukaryotic, multicellular, autotrophic, and a cell wall made of cellulose. Which kingdom is the teacher describing? Animalia Protista Plantae Eubacteria

Before 1918 approximately 60% of the wolves in a region were male, and 40% were female. However, cattle ranchers in this area have made a determined effort to exterminate wolves. From 1918 to the present, approximately 65% of wolves in the region are male, and 35% are female. Biologists suspect that male wolves are more likely than females to return to an area where the population has been greatly reduced.

What term is a male or female reproductive cell? (A) semen (B) androgens (C) testosterone (D) gamete

Identifying Kingdoms For each of the following, read the characteristics and then identify the kingdom. - is multicellular, eukaryotic, autotrophic, and has a cell wall comprised of cellulose. - is multicellular, eukaryotic, heterotrophic, and lacks a cell wall. - is multicellular, eukaryotic, heterotrophic, and has a cell wall comprised of chitin.

Which of the following statements is true regarding the human microbiome? The human microbiome must be controlled to avoid disease. Most bacteria do not cause disease in humans. The human microbiome is established before birth. Human cells vastly outnumber microbial cells in the body.

True or False Question A direct cell count typically determines only the number of live cells in a sample. True False

A nurse is assessing whether a 6 -year-old child has received all required immunizations. Which immunizations does the nurse expect to be documented? hepatitis A; measles, mumps, and rubella (MMR); and inactivated polio virus (IPV) measles, mumps, and rubella (MMR); hepatitis A; and human papilloma virus (HPV) diphtheria, tetanus, and acellular pertussis (DTaP); measles, mumps, and rubella (MMR); and inactivated polio virus (IPV) human papilloma virus vaccine (HPV); diphtheria, tetanus, and acellular pertussis (DTaP); and inactivated polio virus (IPV)

Single-celled animal ancestor Using the figure as your guide, put each item listed below in the order in which animals developed body plan traits-from the single-celled animal ancestor to the chordates. A. Radial symmetry B. As adults, radial symmetry and no cephalization C. Mouth-first development D. Multicellularity E. Initial segmentation F. Chordate segmentation G. Tissues: 2 germ layers H. Backbone development I. Anus first development

When testing water supplies for safety, it is important to differentiate between coliforms that can be naturally found in soils and uncontaminated waters and coliforms that live mainly in human and animal intestines.

A company that makes dog treats is investigating whether a dog's size affects if the dog enjoys the treat or not. The company asked 135 dog owners if their dog enjoyed the chicken-flavored chew sticks. Their responses are given in the following table. Dog Size Enjoyed Did Not Enjoy Small 11 20 Medium 16 28 Large 50 10 If one response is selected at random, what is the probability the response indicated that the dog is small-sized given that they enjoyed the treat? Express your answer as a fraction in lowest terms or a decimal rounded to the nearest millionth.

Which of the following is an example of a secondary sex characteristic? a. Growth of the penis b. Onset of menarche c. Production of mature sperm d. Maturation of breasts

Bromeliads and other tropical plants live in and on rainforest trees, obtaining food and living space from the trees but not helping or harming them. What type of association do trees and bromeliads have, and how much coevolution is occurring to maintain this relationship? Commensalism; significant coevolution Mutualism; little or no coevolution Mutualism: significant coevolution Commensalism: little or no coevolution

Select all that apply Which renal tubule segments are influenced by aldosterone? Collecting duct Proximal convoluted tubule Ascending limb of nephron loop Distal convoluted tubule Descending limb of nephron loop

If a population of otters is reduced dramatically in size, will lead to the loss of substantial genetic variation, even if the population size recovers after a few generations. gene flow a bottleneck artificial selection sexual selection natural selection

Which cell in the stomach secretes hydrochloric acid? Enteroendocrine cell Parietal cell Mucous neck cell Chief cell

Why are bacteria most sensitive to antimicrobial medications during the exponential, or log, phase? The large accumulation of wastes is already damaging to bacteria. Bacteria are already sensitive during this phase due to a lack of nutrients. There are the greatest numbers of bacteria present during exponential phase. Many antimicrobial medications target processes most active when bacteria are growing.

Is marijuana, CBD and hemp all cannabis? (A) Yes (B) No

Below are tables with data in them. The data were obtained from a previous BIO 340 class. Data obtained from reference papers regarding the USA population are also provided and will be used to determine the "Expected" frequency and counts. Some of the information in the table is missing. You will have to analyze the data and provide phenotype, genotype and allele frequencies as well as perform chi-square analyses. Remember, p+q=1. Complete every single empty square. For frequencies, (O-E)^2 / E and χ^2 round to two decimal places. Use whole numbers for counts... people are counted in whole numbers!

Which of the following describes a complete cardiac cycle in a healthy heart? P wave, QRS complex, and T wave

Which buffer system accounts for 75% of all chemical buffering in the body fluids? Multiple Choice The carbonic acid system The phosphate system The bicarbonate system The protein buffer system The ammonium buffer system

When a behavior causes something undesirable to be taken away and the behavior is therefore more likely to be repeated in the future, the type of consequence used is called: extinction avoidance learning punishment positive reinforcement negative reinforcement

Cytokinesis in animal cells involves the formation of the a) anaphase plate b) cleavage furrow c) cell plate d) beads-on-a-string DNA

The mineral below is bright yellow, with a greasy feel and conchoidal fracture. It has a nonmetallic luster and is softer than a penny. What is the name of this mineral? Graphite Hematite Sulfur Pyrite

Kemala is a marine biologist studying the breeding habits of an exotic species of sea turtle. Last year she observed the number of pregnant mother turtles at each beach on an isolated island in the Pacific. The histogram below summarizes the data. Use the histogram to answer each of the questions. (a) One class is the least frequent. How many beaches are in this class? (b) What is the class width? (c) How many beaches had 11 or more pregnant turtles?

A person who is blood type A would have lg M hemagglutinin antibodies against type red blood cells in their plasma.

True or False Question Some infections will not produce any noticeable symptoms, even though the microbe is active in the host. True False

Which of the following is an example of a pest? temperature snakes sunlight water

Starting with the return of blood to the heart at the top, place the major phases of the cardiac cycle in order. (i) Instructions Ventricular ejection Isovolumetric relaxation Ventricular filling Isovolumetric contraction

Which of the following best defines graded potential? - Large, all-or-none changes in membrane potential. - Small, localized changes in membrane potential that vary in amplitude. - A rapid and brief change in membrane potential that travels along the axon. - Depolarization of the membrane potential caused by the opening of voltage-gated channels. - Sustained changes in membrane potential that occur in response to neurotransmitters.

is a muscle shape where the muscle is a broad area that converges to a common attachment point Parallel Circular Pennate Convergent

The duct that drains lymph from the body below the diaphragm, the left upper limb and the left side of the head neck and thorax is the right lymphatic duct bronchomediastinal trunk thoracic duct

When blood is acidic, hemoglobin will oxygen.

Question 17 Which of the following is true: The jejunum of the small intestine connects to the antrum of the large intestine The ileum of the small intestine connects to the cecum of the large intestine The antrum of the large intestine connects to the jejunum of the small intestine The cecum of the small intestine connects to the ileum of the large intestine

Vasomotion may lead to the rerouting of blood from one area of the body to anothe True False Need help? Review these concept resources.

In a genetics experiment on peas, one sample of offspring contained 440 green peas and 598 yellow peas. Based on those results, estimate the probability of getting an offspring pea that is green is the result reasonably close to the value of 3/4 that was expected? The probability of getting a green pea is approximately (Type an integer or decimal rounded to three decimal places as needed) Is this probability reasonably close to 3/4 ? Choose the correct answer below A. No, it is not reasonably close B. Yes, it is reasonably close.

Which of the following is predominately made up of myosin? G actin Factin The thin filament The thick filament The elastic filament

Based on the below image, which of the following statements is true? A. Recombination of the body color and re/cinnabar eye alleles will occur more frequently than recombination of the alleles for wing length and aristae length. B. Recombination of the body color and aristae length will occur more frequently than recombination of red/brown eye alleles and aristae length alleles. C. Recombination of the gray/black body color and long/short aristae alleles will not occur. D. Recombination of the red/brown eye and long/short aristae alleles will occur more frequently than recombination of the alleles for wing length and body color.

How does MOST thyroid hormone travel in the blood? a.) Free T3 b.) Free T4 c.) T3 and T4 bound to colloid d.) T3 and T4 bound to thyroxine-binding proteins (TBGs)

Which term refers to the amount of air inhaled and exhaled during one cycle of quiet breathing? Inspiratory reserve volume Residual volume Tidal volume Expiratory reserve volume

Which of the following keep(s) nerve fibers insulated from one another? Multiple Choice Epineurium Perineurium Fascicles Endoneurium Blood vessels

What properties of intermediate filament (IF) monomers distinguish them from actin or tubulin monomers?

Oxygen is the terminal electron acceptor in respiration.

The term sterile means free of all life forms. a) True b) False

Why are jatropha plants grown for biofuel over other crops? The seed contains a high oil content. The rainy climate is good for growing the plants. The plants do not take up much field space. The fruits can also be eaten.

Question 35 (1.052 points) Rather than to argue that a virus is "alive," it is preferred to say a virus is . a) active b) weak c) attenuated d) abiotic

Ingested nutrients spend at least hours in the small intestine as chemical digestion and absorption are completed.

If a plant heterozyous for three genes (DdEeff) is allowed to self-pollinate, what is the probability that the offspring will be homozygous recessive for all three genes? 1/64 1/16 1 / 32 1 / 4 1/12

There are two major types of water reabsorption that occurs in the kidney. In some area, water permeability cannot be adjusted because aquaporins are always present in the cell membranes. Water absorption in these areas is called water absorption.

The number of bacteria P(t) in a certain population increases according to the following function, where time t is measured in hours. P(t)=3000 e^(0.09 t) Find the initial number of bacteria in the population and the number of bacteria after 7 hours. Round your answers to the nearest whole number as necessary.

Which of the following causes signs and symptoms that mimic the infection caused by Neisseria gonorrhea? Multiple Choice - Staphylococcal toxic shock syndrome. - Mycoplasma pneumonia - Chlamydia trachomatis - Treponema pallidum - Escherichia coli

EACH of the following is TRUE of viral diseases transmitted to humans by an arthropod EXCEPT: they include yellow fever, dengue, and tick-borne encephalitis they are referred to as arboviruses, short for "arthropod-borne" viruses they include Zika, Chikungunya, and West Nile they include Chagas, malaria, and Rocky Mountain spotted fever

Which of the following statements is true about heroin? It is a hallucinogen. It is the most widely abused opiate. It is synthesized from marijuana. It stimulates the functioning parts of the brain.

Which of the following combinations are both forces of evolution? Selection and Mutation random mating and no migration Migration and no selection Mitosis and migration

The layer of the serous pericardium is tightly adhered to the heart, whereas the layer of the serous pericardium is tightly adhered to the fibrous pericardium. Multiple Choice parietal; visceral visceral; parietal visceral; fibrous fibrous; superficial

Axon Structure Branches that may occur along an axon are called: dendrites telodendria hillocks collaterals

The nerves associated with the GI tract consist of both sensory and motor axons.

Using different neural networks to simultaneously encode the sights, sounds, and smells of a remembered football game best illustrates (A) distributed practice. (B) implicit memory (C) parallel processing. (D) chunking.

Question 12 Homework · Unanswered · Due Nov 10th, 11:59 PM Mark as: None Which components of speciation would be least likely to be a part of punctuated equilibrium? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a a division of populations b a change in environmental conditions c ongoing gene flow among all individuals d a large number of mutations taking place at once Unanswered Submit

The formation of what structure would be impaired if a cell was lacking CTCF proteins? Multiple Choice Nucleosome 30-nm fiber Loop domains Double helix

A single cell, or a structure consisting of a group of cells, that makes and secretes a substance is called a(n) Multiple Choice neuroglial cell adipocyte tumor gland

A double stranded stretch of eukaryotic DNA is 250,000 bp long. If the average linker is about 54 base pairs, how many nucleosomes would be present on this piece of DNA? Multiple Choice O 1250 O 200 O 1712 O 4630 < Prev 23 of 61 Next >

Concept Check 2: Understanding B Cell Activation 1. Antigen-presenting cells - are always macrophages. - are always dendritic cells. - are always phagocytic cells. - present antibody fragments on their surface. - include macrophages, dendritic cells and B cells. 2. All of the following cells have class II MHC receptors on their surface EXCEPT - macrophages. - neutrophils. - red blood cells. - dendritic cells. - B cells. 3. Helper T cells - function in both cell-mediated and humoral immunity. - function in both cell-mediated and innate immunity. - function only in cell-mediated immunity. - function only in humoral immunity by secreting antibodies. - function sometimes in cell-mediated and other times in humoral immunity.

LEARNING OBJECTIVE: Illustrate the structure and replication of DNA. When considering order or progression of compactness, which of the following is the most compact and coiled form of DNA? a.) Chromatin b.) DNA Polymerase c.) Chromosome d.) Nucleosome

The cell indicated by the letter "A" is a(n) choose your answer... lymphocyte monocyte eosinophil thrombocyte basophil erythrocyte neutrophil

On scratch paper sketch the Central Dogma of Molecular Biology with the following components: Protein, DNA, RNA and two arrows. Now fill in the black with a single word to complete the three statements below. 1. The first arrow is immediately before 2. The first arrow represents 3. The second arrow represents

What types of transport are utilized during glucose reabsorption and where do they occur?

What is the primary function of the Calvin cycle? use ATP to release carbon dioxide use NADPH to release carbon dioxide split water and release oxygen transport RuBP out of the chloroplast synthesize simple sugars from carbon dioxide

One reason to get more of your protein from plants would be to get more fiber, to get more poly and mono unsaturated fats, to lower blood cholesterol. All answer choices are correct.

The onset of the first menstrual cycle for female adolescents is called

The site of photosynthesis chloroplast nucleus ribosome mitochondria

The fact that DNA sequences are more similar in more closely related organisms is evidence of what? Mutation Descent with modification Adaptation Biogeography

28. A biologic contains 50 Lf units of diphtheria toxoid in each 2.5 mL of product. If a pediatric patient is to receive 10 Lf units, how many mL of products should be administered?

Question 10 2 pts Experimental evidence using germ free animals has demonstrated "phenotype transfer" of human disease symptoms using only gut microbes. In these experiments, gut microbiome from people are transferred into the gut of germ free mice, and after colonization, the mice exhibit symptoms of the disease. This indicates that: Conditions like colon cancer appear hereditary because of transfer of microbes to offspring during delivery Gut microbes are the only cause of conditions like obesity, autism spectrum disorder, and colon cancer Gut microbes contribute to presentation of complex diseases thought to have no microbial cause 'Complex human disease like obesity are completely curable using microbiome interventions

Question 4 0.5 pts Mutations that are passed from one generation to the next occur in somatic cells occur in the sex cells are only due to radiation affect both parents and offspring Question 5 0.5 pts If the DNA nucleotide changed from an A to a T, this is called a point mutation germ-cell mutation somatic mutation frameshift mutation

Suppose a crime scene investigator uncovers a partial skeleton and identifies a bone as a human ulna (the ulna is one of two bones in the forearm and extends from elbow to wrist). If the length of the bone is 12 in ., estimate the height of the person before death (use your equation from question 7). (Show your work!) Would you expect this person to be male or female? Explain the reason for your conclusion.

Question 7 Which of the following transport mechanisms requires energy Osmosis Antiports Diffusion Facilitated diffusion

By themselves, heterotrophs would deplete the world of sources and starve to death.

A certain strain of bugs had a population of 72. Two weeks later the population had reduced to 28. (a) Develop the model of the form p = a e^(k t) that represents the population after t weeks.

70% of the 600 coffee mugs at Janelle's Pancake House are dirty. How many dirty coffee mugs are there at the pancake house? coffee mugs

What happens if there is an injury to the post synaptic tissue causing the neurotransmitter not to bind to the receptors of the post synaptic tissue? A. The action potential is not propagated B. The body sends out a different neurotransmitter C. The binding the neurotransmitter and receptor is not necessary D. The action potential will continue to be propagated

The source of energy for bonding between myosin and actin is Multiple Choice ATP. ADP. creatine phosphate. lactic acid.

Select all that apply: Which of the following is an example of a fomite? (A) towels (B) doorknob (C) catheter (D) mosquitoes

Which lymphatic organ's major job is to destroy worn-out red blood cells and return some of the products to the liver: 1) tonsils 2) spleen 3) thymus gland 4) tonsils 5) Peyer's patches

The source of blood carried to capillaries in the myocardium would be the coronary sinus coronary veins coronary arteries fossa ovalis

Which is the reason for observing the respiration rate of a patient in the supine position by placing the arm of the patient across the chest? Patient's convenience Eliminate intermittent sighing Accelerate breathing movement Observe breathing movement Confident Not Sure

9. Explain how each of the following barrier defenses help innate immunity. a. Skin b. Digestive System c. Lacrimal Gland d. Salivary Gland

Which of the following are stages of infection? (Select all that apply) Prodromal Reservoir Means of Transmission Full Incubation Portal of Entry Convalescence

How does activity levels affect flexibility? Low levels of activity allow the body to reduce tendon and muscle length. High levels of activity increase muscle mass, and therefore pull on the tendon and bone, reducing flexibility. Low levels of activity allows the tendons to relax and lengthen, allowing greater flexibility. High levels of activity increases blood flow to the tendons, pulling them tighter. A modified sit and reach involves a tape measure starting at: 10 inches, with the measuring tape extending away from the body until it becomes zero.

Which of the following statements are true? The dietary need for each trace mineral is less than 100 micrograms daily. Hypernatremia may lead to an abnormal increase in blood volume. A blood pressure of 120 / 80 mmHg is considered normal. All of the statements are true. None of the statements are true. Hyponatremia results from sodium consumption of less than 100 mg

Question 6 1 pt When homologous chromosomes cross over, what is the result? Two sister chromatids exchange identical pieces of DNA. Two sister chromatids get tangled, resulting in one altering the sequence of its DNA. Each of the four DNA strands of a homologous pair is broken, and the pieces are mixed. Specific proteins break the two strands of nonsister chromatids and re-join them. Question 7 1 pts

Antibiotics in Infancy A Canadian longitudinal study (1) examined whether giving antibiotics in infancy increases the likelihood that the child will be overweight later in life. The study included 616 children and found that 438 of the children had received antibiotics during the first year of life. Test to see if this provides evidence that more than 70% of Canadian children receive antibiotics during the first year of life. Show all details of the hypothesis test, including hypotheses, the standardized test statistic, the p-value, the generic conclusion using a 5% significance level, and a conclusion in context. (1) Azad MB, Bridgman SL, Becker AB, Kozyrskyj AL, "Infant antibiotic exposure and the development of childhood overweight and central adiposity". International Journal of Obesity (2014) 38, 1290-1298.

Piles of broken, angular rock that have weathered and tumbled downhill accumulate in slopes. talus joint exfoliation

What role does the epidermis play in maintaining overall health and well-being?

Increased calcium ion permeability of the presynaptic terminal cell membrane is caused by.... a) an action potential. b) a decrease in the concentration of sodium ions. c) acetylcholine. d) carbon dioxide.

What is the relationship between heart rate and cardiac output?

At a candy store, the small bag of chocolate holds 20 ounces of chocolate. The large bag holds 25% more than that. How much chocolate does the large bag hold? Which point represents the unknown, the large bag of chocolate? A B C Enter chocolate (ounces) 0% 25% 50% 75% 100% 125% 0 A 20 B C

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