The "Time Since Perturbation" Hypothesis Proposes That, Compared to Temperate

question 30

Multiple Choice

The "time since perturbation" hypothesis proposes that, compared to temperate and polar regions, the tropics are

• A) more diverse because humans have not yet had much impact there.
• B) more diverse because they are disturbed more severely by cooling during glaciations.
• C) less diverse because they are disturbed more severely by cooling during glaciations.
• D) more diverse because they are less heterogeneous in habitat.
• E) more diverse because they are disturbed less frequently.

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Definitions:

Weight Gain

An increase in body weight over a period of time, which can result from an excess of calorie intake over calorie expenditure.

Double-Blind Experiment

An experimental design in which neither the participants nor the experimenters know which participants are in the control group and which are in the experimental group, until after the results are collected, to reduce bias.

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An oral rinse product containing fluoride, intended to reduce dental cavities by strengthening tooth enamel.

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An experimental design where each subject is paired up with another subject with similar characteristics, and one subject from each pair is assigned to the treatment group and the other to the control group.