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science chapter 5
Question | Answer |
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species | a group of similar organisms that can mate with each other and produce fertile offspring |
fossil | the preserved remains or traces of a organism that lived in the past |
adaptation | a trait that helps an organism survive and reproduce |
evolution | the gradual change in a species over time |
scientific theory | a well-tested concept that explains a wide range of observations |
natural selection | the process by witch individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species |
variation | any difference between individuals of the same species |
homologous structures | similar structures that related species have inherited from a common ancestor |
branching tree | a diagram that shows how scientists think different groups of organisms are related |