AP Bio Review- Ecology

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What is mutualism?

Back

A type of symbiotic relationship where both species benefit, such as hummingbirds pollinating flowers while feeding on nectar.

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What is logistic growth in a population?

Back

A model of population growth that shows how a population grows rapidly at first and then levels off as it reaches carrying capacity.

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What does a negative growth population pyramid indicate?

Back

It indicates that the population is decreasing, often due to higher death rates than birth rates.

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What is the competitive exclusion principle?

Back

A principle stating that two species competing for the same resources cannot coexist if other ecological factors are constant.

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What is parasitism?

Back

A type of symbiotic relationship where one organism benefits at the expense of another, such as a tapeworm living in a cat.

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Define commensalism.

Back

A type of symbiotic relationship where one species benefits and the other is neither helped nor harmed.

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What is exponential growth in a population?

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A model of population growth where the population size increases at a constant rate, leading to a J-shaped curve.

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What are R-selected species?

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Species that reproduce quickly and in large numbers, often in unstable environments, such as many insects.

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What is carrying capacity?

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The maximum number of individuals of a species that an environment can sustainably support.

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What is ecological niche?

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The role and position a species has in its environment, including all interactions with biotic and abiotic factors.