Imagine some cosmic catastrophe jolts Earth so that its axis is perpendicular to the orbital plane between Earth and the sun. The most obvious effect of this change would be ________.

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#Question id: 4597

#Section 2: Evolution

Cotton-topped tamarins are small primates with tufts of long white hair on their heads. While studying these creatures, you notice that males with longer hair get more opportunities to mate and father more offspring. To test the hypothesis that having longer hair is adaptive in these males, you should ________.

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#Question id: 11183

#Section 1: Ecology

Which of the following is an example of a density-independent mechanism?

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#Question id: 12145

#Section 1: Ecology

If population size is exactly half of carrying capacity: 

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#Question id: 12126

#Section 4: Behavioural Ecology

Which of the following describes a successional event in which one organism makes the environment more suitable for another organism?

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#Question id: 12357

#Section 1: Ecology

A uniform distribution is often the result of