TEK 10B*

What did Peter and Rosemary Grant study to understand natural selection in action?

• The behavior of marine animals in the Galapagos

• Darwin's finches on the island of Daphne Major

• The migration patterns of birds in North America

• The plant species diversity on a volcanic island

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According to the Grant study, a significant factor that allowed some finches to survive the drought of 1977 was (a)   .

• The color of their feathers
• The size and power of their beaks
• Their ability to fly long distances
• The speed at which they could build

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What is the definition of natural selection as described in the document?

• The survival of the fittest based on random events

• The process by which species adapt to changes in weather

• Individuals with traits that are best suited for their environment will survive and pass on their traits to their offspring

• The survival of the largest and strongest individuals in a population

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How does inherited variation relate to the finches in the Grant study?

• All finches had the same size beaks, which did not affect survival

• Finches with larger beaks were more powerful and survived better

• Finches with smaller beaks were more adept at finding food

• The color variation in finches' feathers determined their survival

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What could have happened if there was no genetic variation among the finches' beak sizes?

• The finches with smaller beaks would have become the dominant type

• The species might have become extinct due to the inability to consume available food

• The finches would have adapted by developing new food sources

• The drought would have had no significant impact on the finch population

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What does the finite supply of environmental resources lead to, according to the document?

• Increased genetic variation within a population

• No significant change in the population dynamics

• Competition among population members for survival

• A stable and unchanging environment

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Why is genetic diversity essential for the survival of a species?

• It increases the chance of disease spread.

• It decreases the species chance for survival.

• It increases the species chance for survival through natural selection.

• It has no impact on the survival of a species.

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What is the consequence of the Tasmanian devils lacking variation in the immune gene that regulates a part of their immune system?

• They are more resistant to diseases.

• They are less likely to suffer from diseases.

• They have an increased population.

• They suffer from a deadly disease called DFTD.

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How might a more diverse histocompatibility immune gene help the Tasmanian devil species?

• It would make them more susceptible to tumor diseases.

• It could help defend the devils from the tumor disease.

• It would have no effect on their ability to fight diseases.

• It would decrease their genetic diversity.

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What genetic variation is found in the peppered moths?

• Wing size: large vs. small.

• Speed: fast vs. slow.

• Color: light vs. dark.

• Size: big vs. small.

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