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Definition
| a natural process that results in the survival and reproductive success of individuals or groups best adjusted to their environment and that leads to the perpetuation of genetic qualities best suited to that particular environment |
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Definition
| a group of interbreeding organisms that represents the level of organization at which speciation begins |
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Definition
| modification of an organism or its parts that makes it more fit for existence under the conditions of its environment |
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Term
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Definition
| the inability of a species to breed successfully with related species due to geographical, behavioral, physiological, or genetic barriers or differences |
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Definition
| the acquisition of dissimilar characters by related organisms in unlike environments |
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Definition
| the process of biological species formation |
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Term
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Definition
| active demand by two or more organisms or kinds of organisms for some environmental resource in short supply |
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