Biodiversity and Sustainability

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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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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A drought has hit this grassland biome. How will this affect 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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Brown trout consume (eat) more tadpoles when the fly larvae reduce in number (decrease).  This proves...

• The dependence of organisms and biodiversity in an ecosystem
• Diversity increases as organisms decrease
• Losing an animal is good for ecosystems
• Changes in ecosystems create new organisms

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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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Humans are not affected by the biodiversity of ecosystems.

• True
• False

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What is true about sustainability?

• Having a small number of species increases biodiversity

• Sustainability is how organisms change over time

• Sustainability is how much rainfall and sunlight an ecosystem receives

• The more different types of species you have (biodiversity) the better an ecosystem can sustain itself

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A certain area of the Indian ocean is expected to dry up and become a desert over thousands of years. What will happen to the sustainability of this ocean?

• Sustainability would increase because the number of species would increase

• Sustainability would remain the same

• Sustainability would decrease because the number of species would decrease

• Not enough information is given

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