BIOB51H3 Lecture Notes - Lecture 4: Soapberry, Reproductive Isolation, Miscarriage
27 Feb 2014
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Document Summary
Similar location, similar embryonic origin but different function. Descended from ancestors that didn"t necessarily live in the dark, they"ve just been able to exploit whatever resources are in the cave and become adapted to cave living. Vestigial structures: how evolution creates this, not created by selection acting against a particular structure. If selection was acting to reduce or remove a particular structure, you might not see any evidence of it at all. Also shows us that as species change, have adapted more to their particular environments by using the energy from one function for a more advantageous one making it thrive in its environment (possibly) and these adaptations get passed on. Because it wasn"t directly selected against, it"s still there and because it"s not selected for, it"s become really reduced. You can see different structures becoming more important, more adaptive, and more common and these other structures that are less advantageous becoming reduced.
