Chapter 22 - Evolutionary Patterns

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10 Terms

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phylogenetic tree

A branching diagram that represents a hypothesis about the evolutionary history of a group of organisms

- built on the basis of shared derived characters

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phylogeny

Evolutionary history of a species

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monophyletic

includes a common ancestor and all of its descendants

<p>includes a common ancestor and all of its descendants</p>
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sister groups

groups that are more closely related to each other than either of them is to any other group

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paraphyletic

includes a common ancestor and some, but not all, of its descendants

<p>includes a common ancestor and some, but not all, of its descendants</p>
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polyphyletic

does not include the common ancestor

<p>does not include the common ancestor</p>
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Three domains of life

Bacteria, Archaea, Eukarya

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Synapomorphy

shared derived character

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trace fossils

A type of fossil that is an imprint from organisms without hard parts

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carbon dating

a scientific method of determining the age of an artifact

- tracks free neutrons