Question 1

Polyploidy may arise as a result of nondisjunction during meiosis but not mitosis.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following statements about allopatric speciation is FALSE?

Accepted Answer

A)  Flowering plants tend to speciate over small distances.
B)  Snails tend to speciate over small distances.
C)  Birds tend to speciate over large distances.
D)  Organisms with restricted dispersal should form new species over large areas.
E)  Organisms with large dispersal ability should form species over large distances.

Question 3

When plants heterozygous for a trait self-pollinate there will be a(n) :

Accepted Answer

A)  decrease in the frequency of individuals homozygous recessive for that trait.
B)  decrease in the frequency of individuals homozygous dominant for that trait.
C)  decrease in the frequency of individuals heterozygous for that trait.
D)  increase in the frequency of individuals heterozygous for that trait.
E)  increase in the frequency of homozygous recessive individuals but a decrease in homozygous dominant individuals.

Question 4

The small-scale generation-to-generation change in the frequency of alleles in a population is called microevolution.

Accepted Answer

A) True 
 B)False

Question 5

The key criterion of the biological species concept is that the members of a species:

Accepted Answer

A)  have a similar anatomy.
B)  have a similar morphology.
C)  are all genetically isolated from other species.
D)  can hybridize with each other.
E)  can live in the same area.

Question 6

In sympatric speciation, new species are formed by being separated geographically.

Accepted Answer

A) True 
 B)False

Question 7

The morphological species concept states that species are designated based on anatomical and morphological criteria.

Accepted Answer

A) True 
 B)False

Question 8

In the context of population genetics, fitness refers to an individual being physically fit to survive in a particular environment.

Accepted Answer

A) True 
 B)False

Question 9

According to the gradualism model:

Accepted Answer

A)  the fossil record accurately reflects evolutionary history.
B)  the origin of genera requires mechanisms different from those involved in the origin of species.
C)  evolution occurs by the accumulation of many small changes in the frequencies of genes in a gene pool.
D)  species arise abruptly.
E)  new fossil forms appear rather suddenly in strata.

Question 10

An example of the founder effect is a volcanic eruption destroying a large proportion of a particular plant population.

Accepted Answer

A) True 
 B)False

Question 11

The rate of spontaneous mutations in a population is very low.

Accepted Answer

A) True 
 B)False

Question 12

The type of polyploidy known as allopolyploidy:

Accepted Answer

A)  was discovered in Oenothera lamarckiana by Hugo de Vries.
B)  involves a doubling of chromosome number within individuals of a species.
C)  is involved in allopatric speciation.
D)  is involved in adaptive radiation.
E)  is more common than autopolyploidy.

Question 13

In a population of 1000 plants, the frequency of the a allele is 5 percent.Suppose a fire causes the loss of 500 individuals who are homozygous for the A allele.In this case the fire caused the frequency of a to change from ______ to ______.

Accepted Answer

A)  5; 1
B)  0.05; 1.0
C)  0.05; 0.1
D)  0.5; 1.0
E)  0.5; 0.1

Question 14

An example of natural selection is a plant breeder developing a new variety of rose.

Accepted Answer

A) True 
 B)False

Question 15

In a population, natural selection:

Accepted Answer

A)  can preserve and promote variability.
B)  eliminates only the "less fit."
C)  acts on the genotype.
D)  reduces genetic variability.
E)  reduces the potential for further evolution.

Question 16

Tragopogon mirus and Tragopogon miscellus are examples of species formed by:

Accepted Answer

A)  allopatric speciation.
B)  heterozygote advantage.
C)  coevolution.
D)  allopolyploid speciation.
E)  autopolyploid speciation.

Question 17

In a population that is in Hardy-Weinberg equilibrium, the frequency of a particular dominant allele is 70 percent, and the frequency of the recessive allele is 30 percent.In the next generation, the frequency of the dominant allele will be ______ percent and the frequency of the recessive allele will be ______ percent.

Accepted Answer

A)  70; 30
B)  60; 40
C)  50; 50
D)  40: 60
E)  30; 70

Question 18

In a population that is in Hardy-Weinberg equilibrium, the frequency of a particular recessive allele is 40 percent.What proportion of the population is homozygous for the dominant allele?

Accepted Answer

A)  60 percent
B)  40 percent
C)  36 percent
D)  16 percent
E)  6 percent

Question 19

The experiments with Oxyria digyna and Solidago virgaurea provide evidence that:

Accepted Answer

A)  natural selection does not always result in adaptation.
B)  these species lack developmental plasticity.
C)  clines can sometimes be ignored.
D)  coevolution had occurred.
E)  ecotypes differ physiologically.

Question 20

According to the Hardy-Weinberg Law, over long periods a dominant allele will drive out a recessive allele from a population.

Accepted Answer

A) True 
 B)False

Exam 11: The Process of Evolution

The small-scale generation-to-generation change in the frequency of alleles in a population is called microevolution.

Correct Answer
verified

In a population, natural selection:

Correct Answer
verified

In a population of 1000 plants, the frequency of the a allele is 5 percent.Suppose a fire causes the loss of 500 individuals who are homozygous for the A allele.In this case the fire caused the frequency of a to change from to .

Correct Answer
verified

In sympatric speciation, new species are formed by being separated geographically.

Correct Answer
verified

Correct Answer
verified

The morphological species concept states that species are designated based on anatomical and morphological criteria.

Correct Answer
verified

The type of polyploidy known as allopolyploidy:

Correct Answer
verified

According to the gradualism model:

Correct Answer
verified

The experiments with Oxyria digyna and Solidago virgaurea provide evidence that:

Correct Answer
verified

An example of natural selection is a plant breeder developing a new variety of rose.

Correct Answer
verified

According to the Hardy-Weinberg Law, over long periods a dominant allele will drive out a recessive allele from a population.

Correct Answer
verified

The rate of spontaneous mutations in a population is very low.

Correct Answer
verified

Polyploidy may arise as a result of nondisjunction during meiosis but not mitosis.

Correct Answer
verified

The key criterion of the biological species concept is that the members of a species:

Correct Answer
verified

Tragopogon mirus and Tragopogon miscellus are examples of species formed by:

Correct Answer
verified

When plants heterozygous for a trait self-pollinate there will be a(n) :

Correct Answer
verified

In the context of population genetics, fitness refers to an individual being physically fit to survive in a particular environment.

Correct Answer
verified

Which of the following statements about allopatric speciation is FALSE?

Correct Answer
verified

In a population that is in Hardy-Weinberg equilibrium, the frequency of a particular recessive allele is 40 percent.What proportion of the population is homozygous for the dominant allele?

Correct Answer
verified

An example of the founder effect is a volcanic eruption destroying a large proportion of a particular plant population.

Correct Answer
verified

Exam 11: The Process of Evolution

The small-scale generation-to-generation change in the frequency of alleles in a population is called microevolution.

Correct AnswerverifiedShow Answer

In a population, natural selection:

Correct AnswerverifiedShow Answer

In a population of 1000 plants, the frequency of the a allele is 5 percent.Suppose a fire causes the loss of 500 individuals who are homozygous for the A allele.In this case the fire caused the frequency of a to change from ______ to ______.

Correct AnswerverifiedShow Answer

In sympatric speciation, new species are formed by being separated geographically.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The morphological species concept states that species are designated based on anatomical and morphological criteria.

Correct AnswerverifiedShow Answer

The type of polyploidy known as allopolyploidy:

Correct AnswerverifiedShow Answer

According to the gradualism model:

Correct AnswerverifiedShow Answer

The experiments with Oxyria digyna and Solidago virgaurea provide evidence that:

Correct AnswerverifiedShow Answer

An example of natural selection is a plant breeder developing a new variety of rose.

Correct AnswerverifiedShow Answer

According to the Hardy-Weinberg Law, over long periods a dominant allele will drive out a recessive allele from a population.

Correct AnswerverifiedShow Answer

The rate of spontaneous mutations in a population is very low.

Correct AnswerverifiedShow Answer

Polyploidy may arise as a result of nondisjunction during meiosis but not mitosis.

Correct AnswerverifiedShow Answer

The key criterion of the biological species concept is that the members of a species:

Correct AnswerverifiedShow Answer

Tragopogon mirus and Tragopogon miscellus are examples of species formed by:

Correct AnswerverifiedShow Answer

When plants heterozygous for a trait self-pollinate there will be a(n) :

Correct AnswerverifiedShow Answer

In the context of population genetics, fitness refers to an individual being physically fit to survive in a particular environment.

Correct AnswerverifiedShow Answer

Which of the following statements about allopatric speciation is FALSE?

Correct AnswerverifiedShow Answer

In a population that is in Hardy-Weinberg equilibrium, the frequency of a particular recessive allele is 40 percent.What proportion of the population is homozygous for the dominant allele?

Correct AnswerverifiedShow Answer

An example of the founder effect is a volcanic eruption destroying a large proportion of a particular plant population.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

In a population of 1000 plants, the frequency of the a allele is 5 percent.Suppose a fire causes the loss of 500 individuals who are homozygous for the A allele.In this case the fire caused the frequency of a to change from to .

Correct Answer
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