2010 AP Biology生物真题系列之简答题(Form B)免费下载

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2010 AP Biology Free-Response Questions (Form B) Free Download

2010 AP 生物简答题(Form B)部分免费下载

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4）On a trip to a dense forest, a biologist noticed that millipedes (small invertebrates) were plentiful under logs but were rarely seen in any other location.

1. Propose THREE environmental variables (two abiotic and one biotic) that could explain why millipedes are found more frequently under logs.
2. For ONE of the abiotic environmental variables you chose above, design a controlled experiment to test a hypothesis that this factor affects the distribution of millipedes on the forest floor. Describe data that would support your hypothesis.
3. Suppose that you were examining the distribution of a plant, instead of the millipede. Describe modifications in the experiment that you designed in (b) that would be required to determine whether the abiotic factor you chose affects the distribution of the plant.

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