Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

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

Question 3

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

Question 4

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

Question 5

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. 
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 6

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

Accepted Answer

A) True 
 B)False

Question 7

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. 
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 8

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

Question 9

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

Question 10

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. 
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 11

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. 
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 12

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. 
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 13

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. 
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 14

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. 
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 15

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 16

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

Accepted Answer

A) True 
 B)False

Question 17

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 18

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

Accepted Answer

A) True 
 B)False

Question 19

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 20

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

Accepted Answer

A) True 
 B)False

Exam 11: The Process of Evolution

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

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

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

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 ______.

Which of the following statements about allopatric speciation is FALSE?

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

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

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?

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

The type of polyploidy known as allopolyploidy:

In a population, natural selection:

According to the gradualism model:

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

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

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

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

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

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

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

Botany: an Introduction

The Molecular Composition of Plant Cells

The Plant Cell and the Cell Cycle

The Movement of Substances Into and Out of Cells

The Flow of Energy

Respiration

Photosynthesis, Light, and Life

Sexual Reproduction and Heredity

The Chemistry of Heredity and Gene Expression

Recombinant Dna Technology, Plant Biotechnology, and Genomics

Systematics: the Science of Biological Diversity

Prokaryotes and Viruses

Fungi

Protists: Algae and Heterotrophic Protists

Bryophytes

Seedless Vascular Plants

Gymnosperms

Introduction to the Angiosperms

Evolution of the Angiosperms

Plants and People

Early Development of the Plant Body

Cells and Tissues of the Plant Body

The Root: Structure and Development

The Shoot: Primary Structure and Development

Secondary Growth in Stems

Regulating Growth and Development: the Plant Hormones

External Factors and Plant Growth

Plant Nutrition and Soils

The Movement of Water and Solutes in Plants

The Dynamics of Communities and Ecosystems

Global Ecology

Filters

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 .