Chapter 3 Lesson 2: Relationships in Ecosystems

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Last updated 11:50 PM on 7/7/26
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26 Terms

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competition
The struggle between organisms to survive as they use the same limited resources.
The struggle between organisms to survive as they use the same limited resources.
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limiting factor
Any resource that limits the growth of a population in an ecosystem.
Any resource that limits the growth of a population in an ecosystem.
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carrying capacity
The greatest number of individuals within a population that an ecosystem can support.
The greatest number of individuals within a population that an ecosystem can support.
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habitat
The physical place where an organism lives and hunts for food.
The physical place where an organism lives and hunts for food.
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niche
The special role or job that an organism performs within its community.
The special role or job that an organism performs within its community.
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interdependence
A relationship where organisms rely on other living things in order to survive.
A relationship where organisms rely on other living things in order to survive.
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symbiosis
A close relationship between two or more different organisms that lasts over time.
A close relationship between two or more different organisms that lasts over time.
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mutualism
A relationship between two organisms where both living things benefit from each other.
A relationship between two organisms where both living things benefit from each other.
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commensalism
A relationship where one organism benefits while the other is not helped or harmed.
A relationship where one organism benefits while the other is not helped or harmed.
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parasitism
A relationship where one organism benefits while the other organism is harmed.
A relationship where one organism benefits while the other organism is harmed.
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parasite
An organism that lives in or on a host and takes nutrients from it.
An organism that lives in or on a host and takes nutrients from it.
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host
The organism that is harmed by a parasite living in or on its body.
The organism that is harmed by a parasite living in or on its body.
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abiotic factor
A nonliving part of an ecosystem that limits the growth of a population.
A nonliving part of an ecosystem that limits the growth of a population.
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biotic factor
A living part of an ecosystem that limits the growth of a population.
A living part of an ecosystem that limits the growth of a population.
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overcrowding
A condition that happens when too many individuals live in one limited area.
A condition that happens when too many individuals live in one limited area.
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population
A group of organisms of the same species living in the same area.
A group of organisms of the same species living in the same area.
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ecosystem
All the living and nonliving things that interact in a specific environment.
All the living and nonliving things that interact in a specific environment.
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community
All the different populations that live and interact together in an area.
All the different populations that live and interact together in an area.
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producer
An organism that makes its own food using energy from sunlight.
An organism that makes its own food using energy from sunlight.
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consumer
An organism that eats other living things to get energy.
An organism that eats other living things to get energy.
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herbivore
An animal that only eats plants to get its food energy.
An animal that only eats plants to get its food energy.
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carnivore
An animal that only eats other animals to get its food energy.
An animal that only eats other animals to get its food energy.
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predator
An animal that hunts and eats other animals for food in an ecosystem.
An animal that hunts and eats other animals for food in an ecosystem.
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prey
An animal that is hunted and eaten by another animal for food.
An animal that is hunted and eaten by another animal for food.
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resources
The things organisms need to survive, such as food, water, and space.
The things organisms need to survive, such as food, water, and space.
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omnivore

An animal that eats both plants and other animals to get its food energy.

<p>An animal that eats both plants and other animals to get its food energy.</p>