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22 Cards in this Set
- Front
- Back
Organisms in ecosystems are influenced by both biological, or ______, and physical, or _______, factors.
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biotic
abiotic |
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V. These factors include all the living things with which organisms interact.
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Biotic factors
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V. These factors include temperature, soil type, and other nonliving factors.
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Abiotic factors
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V. The area where an organism lives
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habitat
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A habitat includes _____ factors.
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both biotic and abiotic
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V. This consists of all the physical and biological conditions in which an organism lives and the way in which the organism uses those conditions.
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A niche
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This includes what an organism eats and how it gets its food.
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a niche
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Organisms in communities may interact in one of three ways:
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competition,
preda-tion, or symbiosis. |
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Competition occurs when organisms try to use the ____ resources, or necessities of life.
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same
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Competition often results in one organism ____ out.
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dying
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V. This principle states that no two species can occupy the same niche in the same habitat at the same time.
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competitive exclusion principle
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V. This occurs when one organism (the predator) captures and eats another (the prey).
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Predation
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V. This occurs when two species live closely together in one of three ways: mutualism, commensalism, or parasitism.
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Symbiosis
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V. When both species benefit from the relationship.
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mutualism
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V. When one species benefits and the other is neither helped nor harmed.
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commensalism
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V. When one species benefits by living in or on the other and the other is harmed.
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parasitism
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As an ecosystem ____, older inhabitants gradually die out and new organisms move in.
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ages
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V. The series of predictable changes that occurs in a community over time.
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ecological succession
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V. This occurs on bare rock surfaces where no soil exists.
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Primary succession
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V. The first species to live in an area of primary succession.
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pioneer species
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V. This occurs when a disturbance changes a community without removing the soil.
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Secondary succession
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V. This term refers to any necessity of life, such as water, nutrients, light, food, or space.
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Resource
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