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14 Cards in this Set
- Front
- Back
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What is a the niche of an organism>
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The role and position a species has in its environment; includes all biotic and abiotic interactions as a animal meets its needs for survival and reproduction.
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Define biosphere
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The portion of the Earth that supports life; extends from the atmosphere to the bottom of the oceans.
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Define ecology.
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The scientific study of interactions among organisms and their environments.
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Define habitat
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The place where an organism lives out its life.
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What is a scavenger?
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Animals that feed on animals that have already died.
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What is a community?
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A collection of several interacting populations that inhabit a common environment.
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Define ecosystem.
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The interactions among populations in a community; the community's physical surroundings, or abiotic factors.
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What is a population?
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A group of organisms of one species that interbreed and live in the same place at the same time.
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What is a decomposer?
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Organisms that break down and abosrb nutrients from dead organisms.
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What is a decomposer?
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Organisms that break down and abosrb nutrients from dead organisms.
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Define the term "food chain".
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A simple model that shows how matter and energy move through and ecosystem; it can consist of three steps, but must have no more than five steps.
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What are biotic factors?
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The living organisms that inhabit an environment.
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What are abiotic factors?
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The nonliving parts of an organism's environment like temperature, moisture and light.
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What is a food web?
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A model of a community that shows all the possible feeding relationships at each trophic level.
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