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FROG DISSECTION
FROG DISSECTION

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Answer - pennridgebio
Answer - pennridgebio

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Unit IX: Evolution - Ms. Shunkwiler`s Wiki!
Unit IX: Evolution - Ms. Shunkwiler`s Wiki!

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here - ScienceA2Z.com
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evolution test review slides - Sandora Biology
evolution test review slides - Sandora Biology

... subjected to the same selective pressures, they evolve similar structures. These structures are not due to speciation and there is not a common ancestor. Examples: ...
16.4 Evidence for Evolution
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... The hipbones of bottlenose dolphins are vestigial structures. In their ancestors, hipbones played a role in terrestrial locomotion. However, as the dolphin lineage adapted to life at sea, this function was lost. The wings of a flightless cormorant and the legs of an Italian three-toed skink are vest ...
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Darwin`s Contributions
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Vestigiality



Vestigiality refers to genetically determined structures or attributes that have apparently lost most or all of their ancestral function in a given species, but have been retained during the process of evolution. Assessment of the vestigiality must generally rely on comparison with homologous features in related species. The emergence of vestigiality occurs by normal evolutionary processes, typically by loss of function of a feature that is no longer subject to positive selection pressures when it loses its value in a changing environment. The feature may be selected against more urgently when its function becomes definitively harmful. Typical examples of both types occur in the loss of flying capability in island-dwelling species.
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