11 BISC_120 Macroevolution

11 BISC_120 Macroevolution - Quiz 2 starts today! Available...

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1 1 Quiz 2 starts today! • Available on Blackboard (under Lecture Quizzes) 12pm (noon) today to 12pm (noon) Monday (72h) • Covers lectures 8-10 • 5 multiple choice questions (5 points total) 2 Macroevolution * (24.4, 25.5, 25.6) *evolutionary change at or above the species level 3 Many believe in microevolution but not macroevolution “Would an infinite number of Darwinists, working for an indefinite period of time, eventually prove a single instance of evolution producing a new species?” - Stephen H. Webb, in a review of Michael Behe’s The Edge of Evolution (2007 ) 4
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2 5 Critique of macroevolution: irreducible complexity Standard 5 part mouse trap 6 Rebuttal: Pieces of complex systems often have functions of their own 2 part mouse trap http://udel.edu/~mcdonald/mousetrap.html 7 Ex) Bacterial flagellum made of parts that could serve other functions Similar to needle-like structures used to inject toxins Orgel’s second rule: Evolution is cleverer than you are. Complex camera-type eye Pinhole camera-type eye Eye with primitive lens Patch of pigmented cells Eyecup Pigmented cells (photoreceptors) Epithelium Nerve fibers Fluid-filled cavity Epithelium Pigmented layer (retina) Optic nerve Pigmented cells Nerve fibers Cornea Cellular fluid (lens) Optic nerve Cornea Lens Optic nerve Retina Ex) Eyes with a range of complexity still function Complex camera-type eye Pinhole camera-type eye Eye with primitive lens Patch of pigmented cells Eyecup Pigmented cells (photoreceptors) Epithelium Nerve fibers Fluid-filled cavity Epithelium
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11 BISC_120 Macroevolution - Quiz 2 starts today! Available...

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