Biology Questions

Which lipid of the bacterial cell wall causes septic shock when released inte the bloodstream What are the characteristics of the acid fast cell wall is

What will be the growth rate of a facultative anaerobe in the absence of O Hide answer choices A Incorrect No growth A B Sub optimal growth

Which tube is showing the growth of facultative anaerobes

According to parsimony the simplest phylogenetic tree is the tree with the fewest branch tips the tree in which the branch points are based on as many shared derived characters as possible O a tree only using the DNA evidence as this provides the simplest explanation for evolution the smallest tree possible the tree that represents the fewest evolutionary events like changes in DNA sequer es or morphology

32 The highlighted organelle is found in which cell type adipocyte mast cell fibroblast neutrophil

Question 21 1 40 Listen Evolution in a population requires which of the following Select all that Othere must be equal amounts of all alleles there must be some genetic diversity among members of the population selection must be non random the population must always be large all members of the population must be able to reproduce

Which tissue is highlighted perichondrium adventitia serosa O endosteum Submit Request Answer 27

Which structure is highlighted O capsule Olymphoid follicle trabeculae O reticular fiber P Pearson

The highlighted cell O initiates an inflammatory response Odestroys parasites O differentiates into macrophages Osecretes antibodies 502 88 Pearson

Which of the following is a function of the highlighted cell inflammatory response oxygen transport O phagocytosis O destruction of parasitic worms Submit Request Answer

ch of the following statements best summarizes evolution by gene flow It is really is the same as genetic drift It can only occur in very large populations Natural selection can only occur when mutations happen It is occurs as the result of individuals leaving or joining populations It represents the result of selection for acquired characteristics in organisms Question 20 1 point 1 Listen

Liarter oint Which of the following scenarios represents the phenomenon of a bottleneck Most of a population of wildflowers is destroyed in a wildfire Young robins birds are chased off of the parents territory when they reach a certain age Only the hardiest deer survive a harsh winter Some squirrels in a population are affected by a skin disease while others are not Only some males in a group of sea lions are able to reproduce

List the stages of the life cycles for all three classes of Bryophytes starting from the spore stage Spore Mosses Spore Liverworts Hornworts Spore

Listen Which of the following statements best summarizes evolution by genetic drift It is really is the same as gene flow Natural selection can only occur when mutations happen It represents the result of selection for acquired characteristics in organisms It is the random change of allele frequencies over time It can only occur in very large populations

Listen point Which of the following scenarios represents the phenomenon of gene flow Only some males in a group of sea lions are able to reproduce Some squirrels in a population are affected by a skin disease while others are not Most of a population of wildflowers is destroyed in a wildfire Only the hardiest deer survive a harsh winter Young robins birds are chased off of the parents territory when they reach a certain age

Over several generations a population of sparrows appears to have split into two populations in which one group has a smaller body size and the other group has a larger body size This would be a case of disruptive selection directional selection neutral variation the bottleneck effect

In seedcracker finches from Cameroon small and large billed birds specialize in cracking soft and hard seeds respectively If long term climatic change resulted in all seeds becoming hard what type of selection would then operate on the finch population No selection would operate because the population is in Hardy Weinberg equilibrium disruptive selection directional selection stabilizing selection

Imony to constructing a phylogenetic tree choose the tree with the fewest branch points choose the tree that represents the fewest evolutionary changes either in DNA sequences or morphology choose the tree in which the branch points are based on as many shared derived characters as possible choose the tree that assumes all evolutionary changes are equally probable base phylogenetic trees only on the fossil record as this provides the simplest explanation for evolution

estion 8 1 point Lilaste ology Of the following anatomical structures which is homologous to the wing of a bird leg of a grasshopper wing of a dragonfly tail of a horse the front leg of a cat Question 9 1 point fewest evolutionary events like changes in DNA

Question 5 1 point 4 Listen Of the following anatomical structures which is homologous to the wing of a bird tail of a kangaroo wing of a butterfly leg of a cricket fin of a dolphin

In a comparison of birds and mammals having four limbs is a shared ancestral character a shared derived character a character useful for distinguishing birds from mammals a character useful for sorting bird species an example of analogy rather than homology

What organ is labeled as 8 1 2 3 4 Small intestine 5 6 7 8

What region is labeled as 97 4 526 7 8 9 Right iliac region Left lower quadrant Right hypochondriac region Right upper quadrant Epigastric region Right lower quadrant Left iliac region Left hypochondriac region 40 11 12 13

What plane is labeled as 3 4 5 N 2 3

What body region is labeled as 12 14 12 12 34 5 67891 10 11 13 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 40 41 39 42 43 44 45 46 47 48 49 50

9 10 11 12 14 13 Pelvic Scapular Pubic Gluteal Mammary Lumbar Inguinal Sternal Sacral Umbilical Perineal Vertebral 15 16 17 18 19 66699 23 24 25 26 27 28 29 30 31 32 33 35 36 37 38 34 40 41 39 3 44 45 46 49

Listen What is the definition for medial Toward or at the front of the body Closer to the origin of the body part or the point of attachment of a limb to the body trunk Away from the midline of the body Away from the head end or toward the lower part of a structure or the body Toward or at the body surface Toward or at the back of the body Between a more medial and a more lateral structure Below In front of Away from the body surface Above Toward or at the midline of the body Farther from the origin of a body part or the point of attachment of a limb to the body trunk Behind Toward the head end or upper part of a structure or the body

sten What is the definition for lateral Toward or at the front of the body Closer to the origin of the body part or the point of attachment of a limb to the body trunk Away from the midline of the body Away from the head end or toward the lower part of a structure or the body Toward or at the body surface Toward or at the back of the body Between a more medial and a more lateral structure Below In front of Away from the body surface Above Toward or at the midline of the body Farther from the origin of a body part or the point of attachment of a limb to the body trunk Behind Toward the head end or upper part of a structure or the body

If a fellow students says to you I know that goats and sheep are in the same family but how do I know if they are in the same order how would you respond In your answer include a description of what a hierarchy is and how it applies to the classification of organisms

Listen Evolution in a population requires which of the following Select all that apply there must be equal numbers of dominant and recessive alleles in the population no genetic drift selection must be random the population must always be small the production of offspring from a parent population 22 5 points ms of genetic drift and natural

Listen Which of the following scenarios represents the phenomenon of a non random selection Of 1000 produced only two acorns from an oak tree germinate the rest are all eaten by squirrels and birds estion 18 1 point Only the hardiest deer survive a harsh winter O Most of a population of wildflowers is destroyed in a wildfire Because of deforestation a population of birds was reduced from 200 to only 18 individuals O Pollen from pine trees can travel miles in the wind

ou are studying three populations of birds Population A has ten birds of which one is brown a recessive trait and nine are red Population B has 100 birds of which ten are brown Population C has 30 birds and three of them are brown Q In which population would it be least likely that an accident would significantly alter the frequency of the brown allele population A population C Opopulation B They are all the same It is impossible to tell from the information given

15 12 4 Listen If a fellow students says to you I know that goats and sheep are in the same family but how do I know if they are in the same order how would you respond In your answer include a description of what a hierarchy is and how it applies to the classification of organisms

11 15 8 12 Compare and contrast the evolutionary mechanisms of genetic drift and natural selection In what ways are they the same Different A

18 15 00 42 00 09 00 3 00 7 00 49 41 Listen A fruit fly population has a gene with two alleles A1 dominant and A2 recessive Tests show that 70 of the gametes produced in the population contain the A1 allele If the population is in Hardy Weinberg equilibrium what is the frequency of the homozyous recessive genotype point Question 17 1 point Listen Which of the following scenarios represento selection

13 18 11 8 96 Listen Question 20 1 point Listen Which of the following statements best summarizes evolution by natural selection as it is viewed today Question 21 1 point OIt can only occur in very large populations Natural selection can only occur when mutations happen It is the differential survival and reproduction of the most fit phenotypes It is really is the same as gene flow It represents the result of selection for acquired characteristics in organisms Evolution in a population requires which of the follow Othere must be equal numbers population

17 1 in 16 0 1 Listen 1 point Listen Which of the following scenarios represents the phenomenon of gene flow Saved Only the hardiest deer survive a harsh winter Some squirrels in a population are affected by a skin disease while others are not Question 14 1 point Young robins birds are chased off of the parents tel certain age Most of a population of wildflowers is destroyed in a wildfire Only some males in a group of sea lions are able to reproduce Sparrows with average sized wings survive severe stormf longer or shorter wings illustrating Listen h they reach a

Which of the following would be considered derived characteristics of all vertebrates when comparing them to other animal groups Select all that apply four limbs endothermy fur or feathers amniotic reproduction vertebrae none of these Question 11 5 points that goats and sheep are in the same family ild you respond In your

GY 4 Listen Question 14 1 point Sparrows with average sized wings survive severe storms better than those with longer or shorter wings illustrating disruptive selection Ofrequency dependent selection the bottleneck effect Question 15 1 point Ostabilizing selection Oneutral variation ble to reproduce You are studying three populations of birds Populati brown a recessive trait and nine are

1 8 11 15 8 12 9 You observe that 10 out of a population of 50 fruit flies have the homozygous recessive trait of sepia eyes How would you calculate q take 10 divided by 50 and then square it divide 10 by 50 use 40 divided by 50 as p then solve for q Omultiply 10 by 2 O take the square root of 10 divided by 50 Question 13 1 point Listen Which of the following scenarios represents the phenomenon of gene fiqu Only the hardiest deer survive a harsh wint Some squirrels in a

ten To apply parsimony to constructing a phylogenetic tree choose the tree that assumes all evolutionary changes are equally probable choose the tree that represents the fewest evolutionary changes either in DNA sequences or morphology choose the tree in which the branch points are based on as many shared derived characters as possible O base phylogenetic trees only on the fossil record as this provides the simplest explanation for evolution fowest branch points

2 5 6 39 9 3 4 Listen Is it possible for an organism to be in more than one clade Ono because a clade can only have a single ancestor Ono because clades cannot overlap O yes because some clades are nested in other clades O yes because there are many different ways of classifying organis Question 8 1

A fruit fly population has a gene with two alleles A1 and A2 Tests show that 70 of the gametes produced in the population contain the A1 allele If the population is in Hardy Weinberg equilibrium what proportion of the flies carry both A1 and A2 0 7 0 09 00 21 00 42 00 49

Over evolutionary time many cave dwelling organisms have lost their eyes Tapeworms have lost their digestive systems Whales have lost their hind limbs How can natural selection account for these losses Natural selection cannot account for losses only for innovations The ancestors of these organisms experienced harmful mutations that forced them to find new habitats that these species had not previously used Natural selection accounts for these losses by the principle of use and disuse Under particular circumstances that persisted for long periods each of these structures presented greater costs than benefits

2676 388 388 bones in the hind limb of a kangaroo Question 9 1 point 4 Listen Natural selection is based on all of the following except O individuals adapt to their environments and thereby evolve O populations tend to produce more individuals than the environment can support O individuals who survive longer tend to leave more offspring than those who die young Ogenetic variation exists within populations O the best adapted individuals tend to leave the most offspring estion 10 1 maint

In order for a population to evolve the population must reproduce sexually all members of the population must have identical phenotypes natural selection must be acting on the population all members of the population must have identical genotypes its members must have heritable genetic variation Question 3 1 point Listen irms that possess homologous structures probably

98 Question 8 1 point 4 Listen Of the following anatomical structures which is homologous to the bones in the wing of a bird Obones in the flipper of a whale Ochitinous struts in the wing of a butterfly O cartilage in the dorsal fin of a shark Obony rays in the tail fin of a flying fish bones in the hind limb of a kar

Darwin was the first person to propose O a mechanism for how evolution occurs O a mechanism for evolution that was supported by evidence that evolution occurs that population growth can outpace the growth of food resources O that Earth is older than a few thousand years Question 8 1 point Listen Of the following anatomical structures which is homologous to the bones in the of a bird

ring a study session about evolution one of your fellow students remarks The giraffe stretched its neck while reaching for higher leaves its offspring inherited longer necks as a result Which statement is most likely to be helpful in correcting this student s misconception D Disuse of an organ may lead to its eventual disappearance Only favorable adaptations have survival value Characteristics acquired during an organism s life are generally not passed on through genes If the giraffes did not have to compete with each other longer necks would not have been passed on to the next generation Spontaneous mutations can result in the appearance of new traits

Given a population that contains genetic variation what is the correct sequence of the following events under the influence of natural selection 1 Well adapted individuals leave more offspring than do poorly adapted individual 2 A change occurs in the environment 3 Genetic frequencies within the population change 4 Poorly adapted individuals have decreased survivorship 04 2 1 3 02 4 1 3 02 4 3 1 04 1 2 3 4 2 3 1