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Web Animations Post Quiz Chapter 15

The Bottleneck Effect

This activity contains 6 questions.

Question 1
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Which of the following events could NOT be caused by a population bottleneck?
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Question 2
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Which of the following statements about the amoeba population described at the end of the tutorial is true?
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Question 3
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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?
End of Question 3

Question 4
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Small lizards have difficulty defending their territory, but large lizards are more likely to be preyed upon by owls. Which type of selection would act on body size in these lizards under these conditions?
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Question 5
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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.
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Question 6
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Stabilizing selection is responsible for the high incidence of bacterial resistance to antibiotics.
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