change over time
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| species | a group of similar organisms that can mate with each other and produce fertile offspring
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| fossil | preserved remains or traces of an organism that lived in the past
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| adaptation | a trait that increases an organism's ability to survive and reporduce
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| evolution | the process of change over time
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| scientific theory | a well-tested concept that explains a wide range of observations
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| natural selection | the process by which individuals that are better adapted to their environment are more likely to survive and reproduce
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| variation | any difference between individuals of the same species
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| Darwin's hypothesis | species change over many generations and become better adapted to new conditions
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| Galapagos Islands | where Darwin observed strange variations in species
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| Artificial selection | only the organisms with a desired characteristic are bred
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| Factors that affect natural selection | -overproduction
-variation
-competition
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| homologous structures | similar structures that related species inherit from a common ancestor
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| gradualism | involves small changes that add up to major changes over a long period of time
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| punctuated equilibrium | a pattern where species evolve during short periods of rapid change and then don't change much
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Created by:
Ms. Begley
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