Of the following ecosystem types, which have been impacted the most by humans?

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#Question id: 12322

#Section 1: Ecology

Which of the following could qualify as a top-down control on a grassland community? 

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#Question id: 12321

#Section 1: Ecology

Based on the intermediate disturbance hypothesis, a community's species diversity is

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#Question id: 12320

#Section 1: Ecology

Animals that help other animals of the same species are expected to

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#Question id: 12318

#Section 1: Ecology

The evolution of mating systems is most likely affected by

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#Question id: 12316

#Section 1: Ecology

Which of the following might affect the foraging behavior of an animal in the context of optimal foraging? 

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#Question id: 12314

#Section 1: Ecology

Optimal foraging involves all of the following except