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14 Cards in this Set
- Front
- Back
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species
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is a group of similar organisms that can mate with each other and produce fertile offsprings
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fossil
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a preserved remains or traces of organisms that lived in the past
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adaptation
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a trait that increases an organism ability to survive
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evolution
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the process of change overtime
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scientific theory
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a well tested concept that explains a wide range of observations
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variation
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any difference between the same species
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natural selection
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the process by which individuals that are better adapted to their environment and more likely survive and reproduce more than other members of the same species
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DNA
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the genetic material that carries info about an organism and is passed form parent to offspring
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homologous structures
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similar structures that related species have inherited from a common ancestor
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What evidence supports evolution ?
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fossils, patterns of early development, similar body structure all provide evidence that organisms have changed overtime
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What is natural selection
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the process by which individuals that are better adapted to their environment and more likely survive and reproduce more than other members of the same species
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how do new species form?
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A new species can from when a group of individuals remains isolated from the rest of its species long enough to evolve different traits that prevent reproduction
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What patterns describe the rate of evolution?
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gradualism and punctuated equilibrium
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What was Darwin's hypothesis
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that species change over many generations and become better adapted to new conditions
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