Chapter 8 flashcards _ Quizlet

Wasu n d erco n stan tp ressu refro m h isfath erto

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Unformatted text preview: u t. Ch arles Darwin Sp en t fiv e y ears trav elin g th e wo rld o b serv in g liv in g o rg an isms an d co llectin g fo ssils. Was u n d er co n stan t p ressu re fro m h is fath er to mak e so meth in g o f h imself. Dro p p ed o u t o f med ical sch o o l. He an d Alfred Ru ssel Wallace in d ep en d en tly came u p with th e th eo ry o f ev o lu tio n b y n atu ral selectio n . Ev o lu tio n o ccu rs: On ly v ia n atu ral selectio n , g en etic d rift, mig ratio n , o r mu tatio n . mu tatio n s a) Mu tatio n s are almo st alway s ran d o m with resp ect to th e n eed s o f th e o rg an ism. b ) A mu tatio n is an y ch an g e in an o rg an ism's DNA. c) Mo st mu tatio n s are h armfu l o r n eu tral to th e o rg an ism in wh ich th ey o ccu r. d ) Th e o rig in o f g en etic v ariatio n is mu tatio n . Th e ch ief co n cern amo n g co n serv atio n b io lo g ists try in g to p ro tect small p o p u latio n s is: to p reserv e g en etic d iv ersity . Wh en a g ro u p o f in d iv id u als co lo n izes a n ew h ab...
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This document was uploaded on 02/25/2014.

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