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Resh12 - Biology 1B Ecology Lecture 12 Page 1*Assigned...

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Biology 1B, Ecology Lecture 12, Page 1 Professor Resh Spring 2010 *Assigned readings, 8 th Edition pp. No assigned readings 7 th Edition pp. 1106-1133 Microevolution and Ecology Outline of Lecture 12 A. Irish deer B. Freshwater mussel Lampsilis C. Preadaptation D. Altruistic behavior E. How can altruistic behavior evolve? F. Sexual selection G. Does evolution fashion perfect organisms? A. Irish deer: Evolutionary changes should be adaptive but there is no guarantee that a useful structure will continue to be adaptive in changing circumstances. B. Freshwater mussel Lampsilis retains eggs in a pouch called a marsupium; marsupium is fish-shaped larvae are called glochidia, and attach parsitically to the gills of a fish; before being released, larvae are inside the marsupium a related mussel, Cyprogenea , has a worm-like marsupium functional change in structural continuity; A STRUCTURE CAN CHANGE ITS FUNCTION WITHOUT CHANGING ITS FORM
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Biology 1B, Ecology Lecture 12, Page 2 Professor Resh Spring 2010
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