Multiple Choice Questions

The wing of a bat is homologous to the _____ of a whale.
  • gene pool
  • genetic drift.
  • False
  • flipper
Which of the following statements about the amoeba population described at the end of the tutorial is true?
  • Populations produce more offspring than their environment can support
  • It is more vulnerable to extinction due to lack of genetic variation.
  • Increased population size
  • biogeography
According to current evolutionary theory, which of the following is true?
  • nonsister chromatids of homologous chromosomes
  • Populations produce more offspring than their environment can support
  • Populations are the units of evolution
  • the evolution of antibiotic-resistant bacteria
Click on the diagram to start the animation. This animation illustrates _____ as it occurs during _____.
  • the evolution of antibiotic-resistant bacteria
  • crossing over ... prophase I
  • Increased population size
  • It is more vulnerable to extinction due to lack of genetic variation.
As proposed by Darwin, what sorts of traits are favored by natural selection?
  • a filtering process that fine-tunes the traits of populations by sorting among existing, randomly produced variations
  • Physical separation of populations is often part of the speciation process
  • Heritable traits that help individuals survive and reproduce more successfully than others in the same population.
  • any heritable traits that help humans survive and reproduce in the presence of AIDS should become more frequent over time
Based on the video, what can you infer about speciation--the process by which one species splits into two or more species?
  • that lizard horn length evolved as a defense mechanism against predators
  • Populations produce more offspring than their environment can support
  • Physical separation of populations is often part of the speciation process
  • It is more vulnerable to extinction due to lack of genetic variation.
In human gamete production there is an average of _____ crossover events per chromosome pair
  • 2-3
  • genetic drift
  • contribution to the gene pool of the next generation
  • metaphase I
Color is an inherited trait in beetles. If brown beetles move into a population from a nearby island, which of the following statements is correct?
  • Gene flow causes the frequency of the brown allele to increase.
  • Alleles that promote "tallness" will decrease in frequency.
  • It is more vulnerable to extinction due to lack of genetic variation.
  • The Origin of Species by Means of Natural Selection.
What process is illustrated by this animation?
  • the role of chance
  • natural selection
  • in the South Pacific
  • genetic drift.
In a population with brown and green alleles for color, genetic drift
  • the bottleneck effect
  • It is more vulnerable to extinction due to lack of genetic variation.
  • the frequency of the green allele will increase.
  • has more effect on the evolution of a small population.
What do we call scientists who study fossils?
  • The HIV virus has an extremely high rate of mutation.
  • genetic drift.
  • the role of chance
  • paleontologists
In evolutionary terms, an organism's Darwinian fitness is measured by its __________.
  • the evolution of antibiotic-resistant bacteria
  • that lizard horn length evolved as a defense mechanism against predators
  • Populations produce more offspring than their environment can support
  • contribution to the gene pool of the next generation
Imagine that four people are infected with HIV from a common source (an infected blood sample). Initially, the patients' HIV populations are genetically identical. By the time they develop full-blown AIDS, how would the viral populations of the four patients compare?
  • Disruptive selection
  • Green beetles leave more offspring than brown beetles because they are better at finding food.
  • any heritable traits that help humans survive and reproduce in the presence of AIDS should become more frequent over time
  • Each patient's viral population would be unique, specifically adapted to deal with—and overcome—his or her unique immune system responses.
HIV has become an important source of mortality for humans. If AIDS persists as a major factor for humans for many generations in the future, natural selection theory predicts that _____.
  • any heritable traits that help humans survive and reproduce in the presence of AIDS should become more frequent over time
  • Each patient's viral population would be unique, specifically adapted to deal with—and overcome—his or her unique immune system responses.
  • The Origin of Species by Means of Natural Selection.
  • Heritable traits that help individuals survive and reproduce more successfully than others in the same population.
The human immune system cannot effectively suppress the HIV virus on its own. What key feature of HIV makes it so hard to beat?
  • the evolution of antibiotic-resistant bacteria
  • paleontologists
  • the frequency of the green allele will increase.
  • The HIV virus has an extremely high rate of mutation.
True or False. In the example described in the tutorial, the red amoebas survived the catastrophic event, and all future generations of amoebas were red because the red amoebas had a higher reproductive rate than the blue ones.
  • False
  • flipper
  • the bottleneck effect
  • Stabilizing selection
Why did the biologists consider a frog that they found to be a new species?
  • genetics
  • Increased population size
  • gene pool
  • genetic drift
Where are the Solomon Islands located?
  • natural selection
  • in the South Pacific
  • Increased population size
  • the role of chance
In a species of snail, dark-shelled individuals are better hidden from bird predators in the shady forest, while light-shelled individuals are better hidden in well-lit brushy edge areas. If there were no areas of intermediate brightness in this habitat, which type of selection would act on shell color in these snails?
  • white-eye bird
  • Disruptive selection
  • Stabilizing selection
  • the bottleneck effect
Evolutionary biologists studying the evolution of lizard horn length found __________.
  • Physical separation of populations is often part of the speciation process
  • nonsister chromatids of homologous chromosomes
  • It is more vulnerable to extinction due to lack of genetic variation.
  • that lizard horn length evolved as a defense mechanism against predators
Which of the following is an example of natural selection that has been seen in our lifetime?
  • the frequency of the green allele will increase.
  • biogeography
  • Populations produce more offspring than their environment can support
  • the evolution of antibiotic-resistant bacteria
Remember that color is an inherited trait in beetles. Which of the following is an example of natural selection?
  • Green beetles leave more offspring than brown beetles because they are better at finding food.
  • Alleles that promote "tallness" will decrease in frequency.
  • the evolution of antibiotic-resistant bacteria
  • the frequency of the green allele will increase.
Which of the following events could NOT be caused by a population bottleneck?
  • biogeography
  • B, C, F, and G
  • in the South Pacific
  • Increased population size
A process in which organisms with certain inherited characteristics are more likely to survive and reproduce than are individuals with other characteristics is called _____.
  • Disruptive selection
  • natural selection
  • Stabilizing selection
  • the bottleneck effect
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Multiple Choice Questions
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