Unit 9 Review (Biology)

How would a population decrease in primary consumers affect the ecosystem?

• Primary producers would suddenly decrease.

• Secondary consumer populations would eventually decrease.

• Secondary consumer population would increase.

• There would be no overall effect.

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NGSS.MS-LS2-1

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How would energy first enter a pond ecosystem?

• Through growth of algae

• Through decay of dead fish

• Through light from the sun

• Through runoff from fields

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NGSS.MS-LS1-6

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Which describes the possible flow of energy in an ecosystem?

• Snakes to frogs to caterpillars to trees

• Trees to caterpillars to frogs to snakes

• Trees to frogs to snakes to caterpillars

• Caterpillars to trees to frogs to snakes

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NGSS.MS-LS1-6

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Which statement best describes a trophic level?

• It is the feeding position of an organism in a food chain.

• It is the niche of an organism in an ecosystem.

• It is the position of an organism in an ecosystem.

• It is the feeding role of an organism in an ecosystem.

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NGSS.MS-LS2-3

Which of the following is usually found in the smallest number in a pyramid of numbers?

• Producers

• Secondary consumers

• Primary consumers

• Tertiary consumers

Which member is most likely to be affected by mercury: algae-zooplankton-salmon-bear?

• Algae

• Zooplankton

• Salmon

• Bear

Why might an introduced animal species overrun native species in an ecosystem?

• Its population size is smaller than those of native species.

• It is a predator of the native species.

• It is more energy efficient so it eats less food.

• It often has no natural enemies.

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NGSS.MS-LS2-2

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Which of these levels of organization includes the other levels?

• Community

• Ecosystem

• Organism

• Population

Which would be an abiotic factor for a tree in the forest?

• A caterpillar eating its leaves

• A bird nesting in its branches

• Wind blowing through its branches

• Fungus growing on its roots

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NGSS.MS-LS2-3

An insect is gathering pollen and nectar for food, but aids reproduction shows what?

• Predation

• Commensalism

• Mutualism

• Parasitism

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NGSS.MS-LS1-4