NC Biology EOC Review: Ecosystems

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What is Parasitism?

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A relationship where one organism benefits at the expense of another, such as humans and lice.

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What is Territoriality in animals?

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A behavior where animals defend a specific area against others, often through aggressive displays and sounds.

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What does it mean for an organism to be heterotrophic?

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It means the organism obtains nutrients by consuming other organisms or their products.

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What is Commensalism?

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A relationship where one organism benefits while the other is neither helped nor harmed, such as an egret feeding on insects stirred up by a rhino.

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What is the uppermost trophic level in a trophic pyramid?

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It consists of apex predators, such as eagles, which are at the top of the food chain.

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Define Ecosystem.

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A community of living organisms interacting with their physical environment.

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What is a Trophic Level?

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A position in a food chain or food web, defined by how an organism obtains its energy.

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What is Mutualism?

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A symbiotic relationship where both organisms benefit, such as bees pollinating flowers.

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What is Competition in ecology?

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A relationship where two or more organisms vie for the same resources, such as food, space, or mates.

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What is the role of Decomposers in an ecosystem?

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Organisms that break down dead material, returning nutrients to the soil.