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12 Cards in this Set
- Front
- Back
what is evolution?
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changes of species over time
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what are adaptations?
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inherited traits that allow organisms survive and reproduce
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difference between acquired traits and inherited traits?
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acquired traits: isn't passed down from offspring
inherited traits: determined by genes |
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definition of biogeography ?
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the study where the organisms live today and where their ancestors lived in the past
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difference between convergent and divergent evolution?
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Convergent: unrelated species that look similar because they live in similar environments.
Divergent: related species that look different because they live in different environments. |
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definition of fitness?
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the ability for an organism to survive and reproduce.
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difference between artificial and natural selection?
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Artificial selection: nature provides variation and humans select those they find desirable.
Natural selection: nature picks the best fit. |
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conditions necessary for natural selection to occur?
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1)Struggling for existence
2)Variation and adaptation 3)Survival of the fittest 4) Natural selection occurs |
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what is the principle of common descent?
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every living species are descendants from the same common ancestors
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list the evidence for evolution!
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1)biogeography
2)age of earth and fossil records 3)comparing anatomy and embryology 4)genetics and molecular biology 5)testing natural selection |
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what does the phrase " struggle for existence" mean?
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members of population compete for necessities of life.
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be able to identify examples of homologous, analogous and vestigial structures.
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Homologous: similar structure with different functions
Analogous: different structures with same functions Vestigial: body parts that aren't needed (wisdom teeth, tail bone, appendix) |