Unit 17 Vocabulary

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Abiotic factor

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A non-living part of an ecosystem that shapes its environment. Examples include temperature, light, and water.

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Biotic factor

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A living part of an ecosystem that affects and interacts with other organisms. Examples include plants, animals, and bacteria.

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Competition

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An interaction between organisms or species in which both the organisms or species are harmed. Limited supply of at least one resource (such as food, water, and territory) used by both can be a factor.

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Ecosystem

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A biological community of interacting organisms and their physical environment.

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Organism

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An individual animal, plant, or single-celled life form.

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Population

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A group of individuals of the same species living in a specific area.

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Predation

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An interaction where one organism, the predator, kills and eats another organism, the prey.

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Commensalism

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A relationship between two organisms where one benefits and the other is neither helped nor harmed.

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Mutualism

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A symbiotic relationship between two species in which both species benefit.

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Parasitism

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A relationship between two organisms where one benefits at the expense of the other.