Lesson 53: Biotic and Abiotic Factors

A(n) ______________ can be described as a group of individuals of the same species in a particular area.

• interaction

• survival

• population

• ecosystem

__________________ are abiotic and biotic factors that limit the growth of a population.

• Carrying capacity

• Environmental coefiicients

• Limiting factors

• Environmental pressures

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Organisms and environment function as a unit in a(n) ________________.

• ecosystem

• species

• community

• population

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The ________________ capacity of an environment is limited by the availability of biotic and abiotic resources.

• external

• carrying

• limiting

• interacting

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____________________ is the struggle among organisms for resources such as food, water, and space.

• crowding

• predation

• limitation

• competition

Abiotic factors include all of the following except -

• temperature.

• pH.

• availability of water.

• competition.

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Biotic factors include all of the following except -

• parasitism.

• feeding relationships.

• predation.

• climate.

Ocean currents are a(n) (a)   factor in an ocean ecosystem.

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The maximum number of organisms an ecosystem can support is called the -

• limiting factor.

• carrying capacity.

• abiotic facotr

• biotic factor

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Parasitism is considered a(n) -

• abiotic factor.

• carrying capacity.

• nonessential factor.

• biotic factor.

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