Biodiversity

Biodiversity refers to

• extinct species
• the variety of species on Earth
• nonrenewable resources
• the rate of species decline

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Sustainability refers to

• how many species are present in an ecosystem
• when a species goes extinct
• how long a species lives
• the ability to maintain ecological process over long periods of time.

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The higher the biodiversity, the more sustainable an ecosystem is.

• True
• False

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NGSS.MS-LS2-5

Which best explains why producers are at the beginning of all food chains?

• They turn dead animals into nutrients
• They provide shelter for smaller animals
• The transfer energy from the sun into food

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NGSS.MS-LS1-6

A drought has hit this grassland biome. How will this effect the rabbit population?

• The rabbits will increase in number.
• The rabbit population will stay the same.
• The rabbit population will decrease.
• The rabbit population will become extinct immediately.

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NGSS.MS-LS2-4

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In a grassland ecosystem, lions prey on wildebeest. The population of lions has declined steadily because of illegal hunting. What will most likely happen to the population of wildebeest?

• The wildebeest population will increase
• The wildebeest population will decrease
• The wildebeest population will remian the same

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NGSS.MS-LS2-4

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Field mice eat corn. Which would most likely happen if the field mouse population grew?

• There would be more corn to feed the field mice.
• There would be less corn due to the mice eating it.
• The habitat would get overpopulated because the mice woudl eat too much.

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NGSS.MS-LS2-4

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In this tundra food web, if grasses were removed what would happen to the sustainability of the ecosystem?

• There would be an overpopulation of arctic hares and lemmings.
• Polar bears would move to a new ecosystem
• The ecosystem would collapse because it lost its main producer
• Wildflowers would die out from the ecosystem

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NGSS.MS-LS2-4

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Humans are not affected by the biodiversity of ecosystems.

• True
• False

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NGSS.MS-LS2-4

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Which of the following situations contributes to the sustainability of an ecosystem

• A. Increase in biodiversity

• B. Decrease in biodiversity

• C. Extinction of a population from the ecosystem

• D. Removal of many populations of organisms

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NGSS.MS-LS2-4

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