Question 1

Explain why extinction is a necessary aspect of evolution.What would happen if nothing died and there were no extinction?

Accepted Answer

Extinction is a necessary aspect of evol...

Question 2

The concept that each successive stage in the development of an individual represents the adult form that appeared in development of its evolutionary history is termed

Accepted Answer

A)   Larmarckism.
B)   Heterochrony.
C)   Paedomorphosis.
D)   Recapitulation.E) None of the above
F) A) and D)

Question 3

Which condition is NOT among the requirements of Hardy-Weinberg equilibrium?

Accepted Answer

A)   No mutations
B)   No net migration of alleles into or out of the population
C)   Small population with genetic drift
D)   No selection of one genotype over anotherE) A) and B)
F) B) and C)

Question 4

Research indicates people are most likely to select a mate from a nearby village or city,or high school or college.Therefore,the Hardy-Weinberg equilibrium does not apply well to human populations because

Accepted Answer

A)   allele frequency changes in one direction are balanced by changes in the opposite direction.
B)   there is no directional trend in selection of mates since most individuals marry someone.
C)   individuals are not pairing up by chance across the whole population, and therefore mating is not random.
D)   we accumulate adaptive traits that improve the population.E) A) and C)
F) C) and D)

Question 5

What is the correct sequence extending down from the phenotype to the genetic unit?

Accepted Answer

A)   Phenotype-codon-protein-amino acid-protein
B)   Phenotype-protein-protein-amino acid-codon
C)   Phenotype-protein-protein-codon-amino acid
D)   Phenotype-amino acid-protein-protein-codonE) A) and B)
F) None of the above

Question 6

Which one of the following is NOT an observation of a population where natural selection is at work?

Accepted Answer

A)   There is variation that can be inherited in a population
B)   The population always becomes adapted to its environment
C)   Many more individuals are produced by a population than can survive and reproduce
D)   Adaptive characteristics in some individuals make them more likely to survive and reproduce
E)   All of the choices are correctF) A) and E)
G) A) and D)

Question 7

Define sexual selection and provide an example.

Accepted Answer

Sexual selection is a concept in evoluti...

Question 8

Niles Eldridge and Stephen Jay Gould proposed that speciation is an episodic event that occurs in variable time periods ranging from thousands to hundreds of thousands of years,all of which are geologically brief time periods,and that there are long periods of evolutionary stasis in between,a theory called _______ ________.

Accepted Answer

punctuated...

Question 9

When we compare amino acid differences to estimate the evolutionary "distance" between organisms,what assumptions are being made about the rate at which mutations occur over time?

Accepted Answer

When comparing amino acid differences to...

Question 10

Which of the following is a (are) true fossil(s) ?

Accepted Answer

A)   The remains of an actual insect in amber or the tissue of a frozen extinct mammoth
B)   Skeletal parts where bones have been replaced by minerals
C)   Molds, casts, or impressions
D)   Fossilized excrements (coprolites) 
E)   All of the choices are technically fossilsF) A) and C)
G) B) and E)

Question 11

A population that undergoes a major reduction in size is said to experience a population ___________.

Accepted Answer

The answer of A population that undergoes a major reduction...

Question 12

Which of the following contribute(s) to evolution?

Accepted Answer

A)   Mutations
B)   Gene flow
C)   Genetic drift
D)   Natural selection
E)   All of the choices are correctF) A) and D)
G) C) and D)

Question 13

In his voyage on the H.M.S.Beagle,most of Darwin's observations about changes in species over time and in different environments took place in and near where?

Accepted Answer

A)   North America
B)   Africa
C)   South America
D)   AsiaE) A) and B)
F) A) and C)

Question 14

If Hardy-Weinberg equilibrium is met,what is the net effect?

Accepted Answer

A)   Evolution leading to a population better adapted to an unchanging environment
B)   Evolution leading to a population better adapted to a changing environment
C)   Very slow and continuous evolution with no increased adaptation
D)   No evolution because the allele frequencies in the population remain the same from generation to generationE) All of the above
F) None of the above

Question 15

In the early 1990s,the African honeybee migrated across the Mexican border into the United States.Our domesticated honey bee-originally from Europe-is slow to sting,requires abundant flower nectar,forages later in the morning,does not tolerate subtropical conditions as well as the "Africanized" honey bee,and stores much honey but only produces enough new brood to swarm once a year.Because the European honey bee was performing poorly as a honey producer in South America,the African subspecies had been imported in a breeding experiment.The African honey bee formed small nests,foraged earlier and created more honey using smaller nectar sources,produced less honey stores and more brood,swarmed four or five times a year,and was fast to sting.However,when African queens escaped,the two bee populations interbred and the African genotype spread about 300 kilometers north each year.Unexpectedly,a hundred kilometers behind the expanding range of the African honey bees,the European and hybrid hives died out in subtropical areas and the bees were essentially 100 percent African.How would this be explained in evolutionary genetics terms?

Accepted Answer

A)   Gene flow is not occurring and therefore these are two separate species
B)   This is a natural consequence of the Hardy-Weinberg equilibrium
C)   Obviously the African bee genes are dominant over the European honeybee alleles
D)   Gene flow is occurring between these subspecies but the African bee is ecologically better suited for foraging and reproducing in the subtropics, but is not as successful as the European honeybee in temperate areas
E)   Migration will counteract the problem and eventually cause the bee to revert back to the European traitsF) A) and D)
G) B) and E)

Question 16

Sibling species are represented by

Accepted Answer

A)   two species that look very much alike but are actually distantly related.
B)   offspring that have the same parents but can no longer interbreed.
C)   the two halves of a population that have been split by a vicariant event but could still interbreed if sympatric.
D)   species that appear essentially identical in phenotype but have evolved differences in behavior or chemistry that prevent mating.
E)   a collection of specimens that are similar but have not yet undergone any test of interbreeding to determine if they are truly separate species.F) D) and E)
G) A) and B)

Question 17

The generation of ecologically diverse species from a common ancestral stock is called ________________.

Accepted Answer

The answer of The generation of ecologically diverse species from...

Question 18

Before the 18th century,theories on the origin of species are best described as

Accepted Answer

A)   nonexistent.
B)   simple, with early Greek philosophers seeing fossils as destroyed life forms, but not placing them into an evolutionary concept.
C)   foundational, with early Greek philosophers seeing fossils as a continuous lineage but merely lacking the genetic understanding to explain it.
D)   complete, but poorly explained in modern scientific terms until Darwin wrote more clearly.E) A) and B)
F) B) and C)

Question 19

Which of the following is required for natural selection to occur in a population?

Accepted Answer

A)   Variation in the population
B)   Inheritance of genetic variation
C)   Differential reproduction so that more fit individuals produce more offspring
D)   Accumulation of adaptive traits so that they increase in the population
E)   All of the choices are correctF) All of the above
G) A) and D)

Question 20

Lamarck's theory of evolution was centered on the idea that

Accepted Answer

A)   individuals with genetic variations have different survival rates.
B)   species are only produced through special creation.
C)   species are fixed and unchanging over time.
D)   an individual organism changes during its lifetime, and these changes can be passed on to offspring.E) All of the above
F) A) and B)

Exam 6: Organic Evolution

Before the 18^th century,theories on the origin of species are best described as

Correct Answer
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Which condition is NOT among the requirements of Hardy-Weinberg equilibrium?

Correct Answer
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In his voyage on the H.M.S.Beagle,most of Darwin's observations about changes in species over time and in different environments took place in and near where?

Correct Answer
verified

Correct Answer
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punctuated...
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Which of the following is a (are) true fossil(s) ?

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Lamarck's theory of evolution was centered on the idea that

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If Hardy-Weinberg equilibrium is met,what is the net effect?

Correct Answer
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The concept that each successive stage in the development of an individual represents the adult form that appeared in development of its evolutionary history is termed

Correct Answer
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When we compare amino acid differences to estimate the evolutionary "distance" between organisms,what assumptions are being made about the rate at which mutations occur over time?

Correct Answer
Answered by ExamLex AI
When comparing amino acid differences to...
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Research indicates people are most likely to select a mate from a nearby village or city,or high school or college.Therefore,the Hardy-Weinberg equilibrium does not apply well to human populations because

Correct Answer
verified

Which of the following contribute(s) to evolution?

Correct Answer
verified

Which one of the following is NOT an observation of a population where natural selection is at work?

Correct Answer
verified

Sibling species are represented by

Correct Answer
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What is the correct sequence extending down from the phenotype to the genetic unit?

Correct Answer
verified

Which of the following is required for natural selection to occur in a population?

Correct Answer
verified

The generation of ecologically diverse species from a common ancestral stock is called ________________.

Correct Answer
verified

A population that undergoes a major reduction in size is said to experience a population ___________.

Correct Answer
verified

Explain why extinction is a necessary aspect of evolution.What would happen if nothing died and there were no extinction?

Correct Answer
Answered by ExamLex AI
Extinction is a necessary aspect of evol...
View Answer

Define sexual selection and provide an example.

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Answered by ExamLex AI
Sexual selection is a concept in evoluti...
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Correct Answer
verified

Exam 6: Organic Evolution

Before the 18th century,theories on the origin of species are best described as

Correct AnswerverifiedShow Answer

Which condition is NOT among the requirements of Hardy-Weinberg equilibrium?

Correct AnswerverifiedShow Answer

In his voyage on the H.M.S.Beagle,most of Darwin's observations about changes in species over time and in different environments took place in and near where?

Correct AnswerverifiedShow Answer

Correct Answerverifiedpunctuated...View AnswerShow Answer

Which of the following is a (are) true fossil(s) ?

Correct AnswerverifiedShow Answer

Lamarck's theory of evolution was centered on the idea that

Correct AnswerverifiedShow Answer

If Hardy-Weinberg equilibrium is met,what is the net effect?

Correct AnswerverifiedShow Answer

The concept that each successive stage in the development of an individual represents the adult form that appeared in development of its evolutionary history is termed

Correct AnswerverifiedShow Answer

When we compare amino acid differences to estimate the evolutionary "distance" between organisms,what assumptions are being made about the rate at which mutations occur over time?

Correct AnswerAnswered by ExamLex AIWhen comparing amino acid differences to...View AnswerShow Answer

Research indicates people are most likely to select a mate from a nearby village or city,or high school or college.Therefore,the Hardy-Weinberg equilibrium does not apply well to human populations because

Correct AnswerverifiedShow Answer

Which of the following contribute(s) to evolution?

Correct AnswerverifiedShow Answer

Which one of the following is NOT an observation of a population where natural selection is at work?

Correct AnswerverifiedShow Answer

Sibling species are represented by

Correct AnswerverifiedShow Answer

What is the correct sequence extending down from the phenotype to the genetic unit?

Correct AnswerverifiedShow Answer

Which of the following is required for natural selection to occur in a population?

Correct AnswerverifiedShow Answer

The generation of ecologically diverse species from a common ancestral stock is called ________________.

Correct AnswerverifiedShow Answer

A population that undergoes a major reduction in size is said to experience a population ___________.

Correct AnswerverifiedShow Answer

Explain why extinction is a necessary aspect of evolution.What would happen if nothing died and there were no extinction?

Correct AnswerAnswered by ExamLex AIExtinction is a necessary aspect of evol...View AnswerShow Answer

Define sexual selection and provide an example.

Correct AnswerAnswered by ExamLex AISexual selection is a concept in evoluti...View AnswerShow Answer

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Before the 18^th century,theories on the origin of species are best described as

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Correct Answer
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Correct Answer
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Correct Answer
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punctuated...
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
Answered by ExamLex AI
When comparing amino acid differences to...
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
Answered by ExamLex AI
Extinction is a necessary aspect of evol...
View Answer

Correct Answer
Answered by ExamLex AI
Sexual selection is a concept in evoluti...
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Correct Answer
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