CPES Ch 7 Test Review Saving Species & Ecosystem Services

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What is genetic diversity and why is it important for species survival?

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Genetic diversity refers to the variety of genes within a species. It is crucial for a species' ability to adapt to changing environments and maintain its capacity for biological evolution.

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How many individuals are needed to maintain sufficient genetic diversity in a population?

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A population must have at least 10,000+ individuals to maintain enough genetic diversity for survival.

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What is overexploitation in the context of species conservation?

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Overexploitation refers to the unsustainable use of natural resources, leading to the depletion of species. Examples include illegal hunting and overharvesting.

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Which of the following is NOT an example of overexploitation: Illegal hunting, Overharvesting, Legal pet trade, or Biomagnification?

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Biomagnification is NOT an example of overexploitation; it refers to the increasing concentration of toxins in organisms at higher trophic levels.

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What are mass extinctions?

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Mass extinctions are events in which a significant percentage of all life on Earth becomes extinct in a relatively short period of time.

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How many mass extinctions have occurred on Earth?

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There have been 5 mass extinctions thought to have occurred on Earth.

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What is an endangered species?

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An endangered species is one that has so few individual survivors that it could soon become extinct.

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What is a threatened species?

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A threatened species is one that is likely to become endangered in the near future.

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What is the difference between endangered and threatened species?

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Endangered species are at immediate risk of extinction, while threatened species are at risk of becoming endangered.

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What is biodiversity?

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Biodiversity refers to the variety of life in a particular habitat or ecosystem, including the diversity of species, genetic variation, and ecosystem diversity.