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Term | Definition |
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fossil record | is made up of all the fossils ever discovered on earth |
mold | the impression of an organism in a rock |
cast | is a fossil copy of an organism in a rock |
trace fossil | is the preserved evidence of the activity of an organism |
geologic time scale | is a chart the divides Earths history into different time units |
extinction | occurs when the last individual organism of a species dies |
biological evolution | is the change over time in populations of related organisms |
naturalist | is a person who studies plants and animals by observing them |
variation | is a slight difference in a inherited trait of individual members of a species |
natural selection | is the process by which populations of organisms with variations that help them survive in their environments live longer |
adaption | is an inherited trait that increases an orgnasims chance of surviving and reproducing in its environment |
camouflage | is an adaption that enables a species to blend in with its environment |
mimicry | The resemblance of one species to another species to blend in with its environment |
selective breeding | breeding of an organism for desired characteristics |
comparative anatomy | the study of the similarities and differences in the anatomy of two species. |
homologous structures | similar physical features in organisms that share a common ancestor, but the features serve completely different functions. |
analogous structures | features of different species that are similar in function but not necessarily in structure and which do not derive from a common ancestral feature |
vestigial structures | Structures that have no apparent function and appear to be residual parts from a past ancestor |
embryology | the branch of biology and medicine concerned with the study of embryos and their development |