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18 Cards in this Set
- Front
- Back
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Lamarck's inheritance of acquired characteristics
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new characteristics arise because of needs and, somehow, the characteristics are passed on
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Artificial Selection
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sweeter corn or seedless watermelon
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Homologous structures
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look different but are actually the same
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Homologous structures
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Analogous structures
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Analogous structures
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look the same but are actually different
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Convergent Evolution
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unrelated animals no where near each other have evolved to occupy similar environments
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Vestigial structures
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remnants of structures
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Genetic variation
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Individuals in all species’ possess variations, such as size, speed, agility, color, etc.
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Overproduction of species
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More animals are born than reach maturity, yet the adult population remains constant.
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Struggle for existence
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Competition for resources results in high mortality rate, which limits population size.
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Differential survival
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favorable variation may give a “competitive edge” in getting resources.
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Adaptation
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Specialized features that allow an organism to excel in its environment
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Camouflage, is an example of an adaptation.
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How does variation occur?
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Sexual recombination through reproduction and mutations
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Gregor Mendel
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genes
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hereditary determinants in all organisms.
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Mutation
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random change in genetic information resulting from chemicals, radiation, extreme temperatures, or randomness.
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