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Definition
| Determining the age of a fossil by direct measurement, usually involving radioisotope decay |
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Definition
| Body part in different species that is similar in function but not in structure that evolved in response to a similar environmental challenge |
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Definition
| A group of similar organisms sharing a set of traits derived from a common ancestor |
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Definition
| A diagram representing the evolutionary relationships of a group of organisms |
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Definition
| A fossil made by pressing an organism in layers of sediment |
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Definition
| The common distinguishing feature of a clade |
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Definition
| The time it takes for half the isotopes in a sample of an element to decay into a second isotope |
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Definition
| A protein or nucleic acid sequence that is very similar in different species |
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Definition
| Similar structures in a different species that have the same general function, indicating descent from a common ancestor |
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Definition
| The preserved evidence of an organism, such as a footprint |
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Definition
| Using differences in molecules as markers for the amount of time that has passed since two species were the same species |
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Definition
| Study of evidence of past life |
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Definition
| The preservation of tissue structure by replacing biomolecules with minerals |
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Definition
| Using measurements of natural radioactive decay as a clock to date fossils |
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Definition
| Determining the age of a fossil by comparisons to known ages of adjacent fossils in rock strata |
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Definition
| Comparison of gene order on chromosomes between species |
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Definition
| Study of the evolutionary relationships among species |
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Definition
| A structure that seems not to have a function in an organism but that resembles a functional organ in another species. |
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