Vocab: Ch. 11 Ecology

The physical or nonliving factors that shape an ecosystem?

• Biotic factors

• Abiotic factors

• Carrying capacity

• Consumer

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The total variety of organisms in the biosphere?

• Biodiversity

• Biological magnification

• Commensalism

• Decomposer

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Biological magnification refers to the:

• Symbiotic relationship where both species benefit

• Largest number of individuals an environment can support

• Increasing concentration of a harmful substance in organisms at higher trophic levels

• Physical factors that shape an ecosystem

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Which term describes any living part of the environment with which an organism might interact?

• Abiotic factors

• Biotic factors

• Carrying capacity

• Competition

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Carrying capacity is defined as the:

• Symbiotic relationship where one organism benefits and the other is neither helped nor harmed

• Largest number of individuals of a particular species that a particular environment can support

• Interaction between organisms competing for the same resources

• Organism that relies on other organisms for energy

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What does commensalism refer to in ecology?

• A symbiotic relationship where both species benefit

• A symbiotic relationship where one organism benefits and the other is neither helped nor harmed

• An interaction between organisms competing for the same resources

• An organism that breaks down and obtains energy from dead organic matter

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Competition in an ecosystem is an interaction that occurs when:

• Organisms rely on each other for energy and food supply

• Organisms break down and obtain energy from dead organic matter

• Organisms or species are harmed by trying to use the same resources

• One species benefits in a relationship and the other is unaffected

What is a consumer in an ecological context?

• An organism that produces its own food

• An organism that relies on other organisms for its energy and food supply

• An organism that benefits from another without harming or helping them

• An organism that increases the concentration of harmful substances in the food chain

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What role do decomposers play in an ecosystem?

• They increase biodiversity by introducing new species

• They break down and obtain energy from dead organic matter

• They compete with other organisms for resources

• They rely on other organisms for energy and food supply

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Mutualism is a type of symbiotic relationship where:

• Both species are harmed

• One species benefits and the other is unaffected

• Both species benefit from the relationship

• One species benefits at the expense of the other

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