BSCS Biology: A Molecular Approach

Chapter 19: Changes in Species

Chapter Test

1.
Which of the following statements best describes how biologists view the theory of evolution?
A)as one of several competing theories to explain the diversity of species
B)as an intriguing idea that is weakened by a lack of evidence in the fossil record
C)as a controversial idea that is being explored through active research
D)as an important idea that is supported by a large body of evidence
2.
Evidence for evolution____.
A)includes direct observations of living organisms
B)can not be obtained in controlled experiments
C)comes primarily from anatomical comparisons
D)is limited to the fossil record
3.
Fossils of feathered dinosaurs uncovered in China are important because____.
A)they provide clues about why dinosaurs became extinct.
B)they reveal information about the evolutionary origin of dinosaurs.
C)they demonstrate that dinosaurs evolved feathers independently of birds.
D)they show intermediate stages in the evolution of birds.
4.
The long bills of hummingbirds which match the shape of flowers from which they sip nectar is an example of____.
A)selective adaptation
B)artificial selection
C)coevolution
D)gradualism
5.
Insects that are resistant to pesticides arise because____.
A)pesticides create selection pressure for the insects to evolve
B)pesticides cause activation of pseudogenes in the insect's DNA
C)the insects are undergoing artificial selection in response to the pesticide
D)pesticides increase the rate of speciation in the insects
6.
Triticale, shown here, is a new species of grain that demonstrates____.
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A)how speciation can be driven by a gene pool in equilibrium
B)how a new species can be created by artificial selection
C)how recombination of alleles can affect speciation
D)how microsatellite DNA contributes to the development of a new species
7.
What is true about polyploidy?
A)Polyploidy occurs most often in animals.
B)Polyploidy can slow down the formation of new species.
C)Polyploid offspring can only mate with other polyploid offspring.
D)Polyploid species can not reproduce asexually.
8.
Which of these statements is true of adaptive radiation?
A)It is used by scientists as a means of artificial selection.
B)It occurs when populations remains stable for long periods of time.
C)It can cause polyploidy.
D)It increases the diversity of life on Earth.
9.
Punctuated equilibrium occurs when____.
A)a population undergoes gradual changes over long periods of time
B)individuals within the population, but not the population itself, evolve
C)the frequency of alleles determines the rate of change of the population
D)a population experiences a rapid burst of evolution
10.
The mass extinction that wiped out most of the dinosaurs also caused ____ of marine species and land-dwelling plants and animals to become extinct.
A)25%
B)50%
C)10%
D)90%
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