Biology S2 Unit 5 Review

Which phrase best defines a biome?

• a group of individuals of the same species

• an interacting community of different species

• a community and its abiotic factors

• a large area dominated by specific kinds of organisms

The Gulf of Mexico provides 72 percent of the shrimp harvested in U.S. waters. Those populations are at risk because of the dead zone in the Gulf of Mexico.

Which statement best describes this dead zone?

• It is a zone of ocean water that has almost no oxygen.

• It is a zone of ocean water that has almost no carbon dioxide.

• It is a zone that formed when it lost its keystone species.

• It is a zone that's been depleted by sea urchins.

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Which choice is not an example of an ecosystem?

• tide pool

• digestive system

• carbon dioxide

• prairie

The Florida Everglades is a unique wetland ecosystem that is constantly undergoing change.

What are the main parts of this ecosystem?

• all the populations of predators and plants

• all the populations and the surrounding environment

• all the biotic factors

• all the water populations and the land populations

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NGSS.MS-LS2-3

An ecologist is studying a newly discovered animal. The ecologist finds that it reproduces quickly and has many offspring each time it reproduces.

Which type of organism is it?

• an r-strategist

• a K-strategist

• density dependent

• logistical

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NGSS.MS-LS3-2

Which statement best explains why the stability of the producer population is important to the stability of the entire ecosystem?

• Many different types of organisms eat producers.

• Producers are responsible for providing energy to the rest of the ecosystem.

• None of the available energy for an ecosystem exists in the producer level.

• More types of producers exist than other types of organisms.

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Which phrase best describes a food chain?

• one pathway through which energy moves from one trophic level to the next

• the various interconnected relationships in an ecosystem

• a relationship between a predator and its prey

• the types of producers in an ecosystem

Before the introduction of the yellow crazy ant to Christmas Island, land crabs ate many plant seedlings in the forest, maintaining a relatively clear forest floor. As the crab population has declined, plant seedlings have flourished. The forest floor is now covered with plants.

Which statement best describes what is occurring on the forest floor?

• Primary succession is occurring because the ant is a new species changing the ecosystem.

• Secondary succession is occurring because the organisms on the forest floor are changing.

• Climax vegetation is occurring because the seedlings finally have the chance to grow.

• Primary succession is occurring because more plant life is healthier for the ecosystem.

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NGSS.MS-LS2-4

A pond located in a town was drained to make room for a new factory.

Which change is likely to occur?

• A new pond will form close to the old one.

• Amphibians from the pond will adapt to land.

• Shorebirds will not be able to nest in the area.

• The amount of algae in the soil will increase significantly.

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NGSS.MS-LS2-4

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NGSS.MS-LS2-1

Where can the largest reservoir of nitrogen be found on Earth?

• underground

• in the ocean

• in the atmosphere

• in plants and animals

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