Chapter 10 Mcgraw Hill Environmental Science

Pick the letter of the term or phrase that best matches the description.

species that are critical to the functioning of an ecosystem

• a. hybrids

• b. ecotourism

• c. biodiversity

• d. genetic diversity

• e. keystone species

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all the different genes contained in all members of a population

• a. hybrids

• b. ecotourism

• c. biodiversity

• d. genetic diversity

• e. keystone species

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tourist experiences among unique wildlife and ecosystems

• a. hybrids

• b. ecotourism

• c. biodiversity

• d. genetic diversity

• e. keystone species

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varieties developed by combining genetic material from other populations

• a. hybrids

• b. ecotourism

• c. biodiversity

• d. genetic diversity

• e. keystone species

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the number and variety of different species in a given area

• a. hybrids

• b. ecotourism

• c. biodiversity

• d. genetic diversity

• e. keystone species

Hunting sea otters along the U.S. Pacific coast resulted in

• a. an increase in biodiversity.

• b. the extinction of kelp.

• c. a decrease in biodiversity.

• d. a reduction in the sea urchin population.

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To which groups do most of the unknown species belong?

• a. mammals and trees

• b. insects and fungi

• c. bacteria and plants

• d. protozoans and algae

A crop that results from combining genetic materials is called

• a. a hybrid variety.

• b. a keystone species.

• c. a bottleneck offspring.

• d. a wildflower species.

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Which level of biodiversity may still be reduced after a species recovers from a threat to its survival?

• a. ecosystem diversity

• b. genetic diversity

• c. population diversity

• d. species diversity

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How do people benefit from biodiversity?

• a. aesthetic or personal enjoyment

• b. variety of food sources

• c. source of new products

• d. all of the above

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