In 2005, the United States had a population of approximately 295,000,000 people. If the birth rate was 13 births for every 1,000 people, approximately how many births occurred in the United States in 2005?

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#Question id: 12327

#Section 1: Ecology

Which  of  the  following  is  the  most  accepted hypothesis as  to  why  invasive  species  take  over  communities into which they have been introduced?

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#Question id: 12324

#Section 1: Ecology

According to the nonequilibrium model,

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#Question id: 12323

#Section 1: Ecology

Which of the following is considered by ecologists a measure of the ability of a community either to resist change or to recover to its original state after change?

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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