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20 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Critical Factor
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The single factor in shortest supply relative to demand which determines where a species lives.
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CRITICAL
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Tolerance Limits
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The minimum and maximum levels of environmental factors that particular species cannot survive or are unable to reproduce in.
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TOLERANCE
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Habitat
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The place or set of environmental conditions in which a particular organism lives.
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Niche
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Either the role played by a species in a biological community or the total set of environmental factors that determine a species distribution.
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Competitive Exclusion Principle
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States that no 2 species can occupy the same ecological niche for long. The most efficient in using available resources will exclude the other.
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COMPETE, EXCLUDE
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Resource Partitioning
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Various populations sharing environmental resources through specialization, thereby reducing competition.
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PARTITION = SHARING
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Geographic Isolation / Allopatric Speciation
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Species arise in non-overlapping geographical locations.
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"LL" = OVERLAPPING
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Sympatric Speciation
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Organisms that live in the same place, but become isolated by other means.
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"SYM" = SAME ANCESTOR
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Genetic Drift
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Ensures that DNA of 2 formerly joined populations eventually diverges.
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GENES SPLIT
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Selection Pressure
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Shape physical, behavioral, and genetic characteristics of individuals, causing population traits to shift over time.
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Directional Selection
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Shift toward an extreme of a trait.
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MOVES IN SPECIFIC DIRECTION
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Stabilizing Selection
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Shift that narrows the range of a trait.
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STABILIZES A SPECIFIC TRAIT
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Disruptive Selection
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Shift that can cause traits to diverge to the extremes.
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DISTURBS NATURAL BALANCE OF TRAITS
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Intraspecific Competition
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Competing among members of the same species.
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"INTRA" = ITSELF
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Interspecific Competition
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Competition between members of different species.
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"INTER" = OTHERS
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Batesian Mimicry
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Harmless animals that have markings similar to poisonous ones.
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NOT BAIT
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Müllerian Mimicry
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2 dangerous species that look alike.
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ü = 2 DANGEROUS
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Mutualism
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A partnership between 2 species where they are both benefited.
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MUTUAL
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Commensalism
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A relationship between 2 species where one is benefited, but the other is neither harmed nor benefited.
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THEY COMMENSE EVEN THOUGH ONE DOESN'T BENEFIT
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Parasitism
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A relationship where one species is benefited, but the other is harmed.
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PARASITE
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