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7 Cards in this Set
- Front
- Back
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primordial
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the first created or developed; the original
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retrogression
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the process of return to a former and less complex level of development or organization
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atavism
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the reappearance of ancestral traits in a modern creature; returning to the origins
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evolution
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the development of an organism into more complex forms over generations
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instincts
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a natural subconscious tendency to respond on an impulse; without learned reason
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adaptation
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the ability to change to better fit the environment
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Survival of the Fittest
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a law under which only the organisms best adapted to their environment are able to survive and pass on their genes
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