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16 Cards in this Set
- Front
- Back
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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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What is natural selection?
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the process by which individuals that are better adapted to their environment are more likely to survive and reproduce more than other members of the same species
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What evidence supports evolution?
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Fossils, patterns of early development, similar body structures, and similarities in DNA and protein structures
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How do new species form?
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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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species
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a group of similar organisms that can mate with each other and produce fertile offspring
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Fossil
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the preserved remains or traces of an organism that lived in the past
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adaptation
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a trait that increases an organism's ability to survive and reproduce.
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Evolution
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the process of change over time
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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 individuals of 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 are more likely to survive and reproduce more than other members of the same species
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DNA
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genetic material that carries information about an organism and is passed from 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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Gradualism
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involves small changes that add up to major changes over a long period of time.
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Punctuated equilibrium
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species evolve during short periods of rapid change and then don't change much
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