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Definition
| describing, naming, and classifying extant (living today) organisms |
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Definition
| a group of two or more taxa or DNA sequences that includes both their common ancestor and all of their descendants |
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Definition
| the branching point on the tree |
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Definition
| the branching patterns in the tree |
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| organisms have similar characteristics even though they are not closely related because they live in similar environments |
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| three steps to create two new species from one species |
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Definition
1. isolate gene pools of the population
2.evolutionary in gene pools through natural selection
3.evolution of reproductive isolation between gene pools |
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Definition
| a fied of science that examines the biological diversity and evolutionary reltionships amng organisms both extant and extinct |
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| the evolutionary history of a species or group of species |
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| a derived character only found in that one group |
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| evaluate possible trees by considering the possible pathways of changs |
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| shared primitive character |
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Definition
species share a common trait with a distant ancestor
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Definition
| a shared trait among a group of organisms that are not shared with a distant ancestor |
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| a taxon tht consists of the most recent ancestor and all of its decendants |
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| method for estimating evolutionary time by basing it on the observation that neutral mutations occur at a constant rate |
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| when a species divides into two new species |
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| a group of organisms that consists of members of sevral evolutionary lines but does not include a common ancestor |
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Definition
| shared traits between species that have originated in their most recent common ancestor |
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Definition
| a group of organisms that contains a common ancestor and some, but not all of its descendants |
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