Identifying Ecosystems

Preserving entire ecosystems rather than individual species is a good conservation strategy because

• only endangered species will be saved

• developers will have greater access to land.

• more than one species can be saved

• it will not be necessary for environmentalists to study the ecosystem.

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Where are some of the unique ecosystems of the United States?

• in Pacific Northwest and California

• in the Florida Everglades and Hawaii

• both of these are correct

• none of these are correct

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Species critical to the functioning of an ecosystem.

• Endemic species

• Keystone species

• Endangered species

• Threatened species

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Variety of habitats and communities within ecosystems.

• Genetic biodiversity

• Biodiversity

• Biodiversity hotspots

• Ecosystem diversity

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Where are many critical biodiversity hotspots located?

• cities and developed areas of the world

• islands, tropical rainforests, and coastal areas

• desert and polar environments

• all are correct

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Garden plants are eaten by snails, which are eaten by birds, which are eaten by the household cat. What happens to the other members of the food chain if the cat is removed?

• The number of plants, snails, and birds increase.

• The number of plants and snails increase and the number of birds decreases

• The number of plants increases and the number of snails and birds decrease.

• The number of plants and birds increase and the number of snails decreases.

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What is an ecosystem?

• A community of organisms and their physical environment interacting as a system

• A single species living in a specific area

• A group of similar species living together

• A large geographical area with uniform climate

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Which of the following is a characteristic of a desert ecosystem?

• High rainfall

• Low biodiversity

• Dense vegetation

• High humidity

What role do producers play in an ecosystem?

• They decompose organic matter

• They consume other organisms

• They produce energy through photosynthesis

• They provide shelter for animals

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Which of the following is an example of a freshwater ecosystem?

• Coral reef

• Mangrove forest

• Lake

• Savanna