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| Natural selection targets... |
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| Which of the following is a true statement about Charles Darwin? |
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| He proposed natural selection as the mechanism of evolution |
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| Speciation without geographic isolation is called _________ speciation. |
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| Aristotle believed which of the following? |
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| Species are fixed (permanent) and do not evolve |
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| Which of the following developed a theory of evolution identical to Darwin's? |
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| Which of the following would seem to be an example of neutral variation? |
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| The study of the genetic variability within a population and the forces that change the allele frequencies is... |
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| An elk herd is observed over many generations. Most of the full-grown bull elk have antlers of nearly the same size, although a few have antlers that are significantly larger or smaller than this average size. The average antler size remains constant over the generations. Which of the following effects probably accounts for this situation? |
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| The term used to describe an event where many species die out over a short period of time is called... |
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| On the Galapogos Islands, Charles Darwin questioned why: |
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| The islands species resembled those from South America. |
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| The evolution of new species is called |
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| A populaton of squirrels is preyed on by small hawks. The smaller squirrels can escape into burrows. The larger squirrels can fight off the hawks. After several generations, the squirrels in the area tend to be very small or very large. Of what process is this an example of? |
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