Biology Chapter 3 Review- Communities, Biomes, and Ecosystems

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What is the aphotic zone?

Back

The ocean's dark lower layer where photosynthesis cannot occur.

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Where are pioneer species most likely to grow?

Back

In a newly formed volcano.

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What is a community in ecological terms?

Back

A collection of organisms that belong to different populations but all live in the same area and interact with one another.

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What is a limiting factor in an ecosystem?

Back

A factor that affects the number of organisms that can live in a particular environment, such as the amount of oxygen in a fish tank.

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What defines a biome?

Back

A large region characterized by a specific type of climate and certain types of plant and animal communities.

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What is the difference between a population and a community?

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A population consists of individuals of the same species living in a specific area, while a community includes different populations interacting in that area.

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What role do pioneer species play in an ecosystem?

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They are the first organisms to colonize previously disrupted or damaged ecosystems, paving the way for other species.

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What is an ecosystem?

Back

A biological community of interacting organisms and their physical environment.

Front

What is the significance of the sunlit upper layer of the ocean?

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It is where photosynthesis occurs, supporting marine life.

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What are benthos?

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Organisms that live on or in the bottom of lakes, streams, and oceans.