Exam 4: Biodiversity and Evolution

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According to the theory of evolution, a giraffe evolved a long neck because it needs it.

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____________________ keystone species feed on and help regulate the populations of other species in an ecosystem.

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How many humans are injured or killed each year by sharks?

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Which of the following is true?

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Mutations are the source of natural selection.

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   Use the Figure above, which represents the niche of the Panda and the raccoon, to answer the following question(s). -Which of the two animals, the panda or the raccoon, is considered a generalist? Use the Figure above, which represents the niche of the Panda and the raccoon, to answer the following question(s). -Which of the two animals, the panda or the raccoon, is considered a generalist?

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The golden toad of Costa Rica is now extinct, perhaps one of the first victims of global warming.

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Which of the following would not be considered a generalist species?

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How many sharks are killed each year by humans?

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Long-term climate changes determine where plant and animal species can survive.

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An ecological niche includes all of the following except

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____________________ is the alteration of an organism's genetic material, through adding, deleting, or changing segments of its DNA.

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Endemic species are particularly vulnerable to extinction.

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Species that are only found in one area are called _______________ and are very vulnerable to extinction.

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Mutations that occur in any cell are passed from generation to generation as a heritable trait.

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As _______________ species, many sharks play crucial roles in helping to keep their ecosystems functioning.

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Briefly explain how natural selection has worked, and is working to change populations over time.

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Charles Darwin and ____________________ both came up with the concept of natural selection as the mechanism for biological evolution.

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Large regions such as forests and deserts, with distinct climates and species, are called _______________.

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   Use the Figure above, which represents the niche of the Panda and the raccoon, to answer the following question(s). -Notice the region lettered C.What does that region represent? Use the Figure above, which represents the niche of the Panda and the raccoon, to answer the following question(s). -Notice the region lettered C.What does that region represent?

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