Chapter 8 Evolution & Natural Selection flashcards _ Quizlet

3 th ereisn o talway sasin g leo p timu m ad ap tatio

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Unformatted text preview: s in in sects? Natu ral selectio n can ch an g e allele freq u en cies fo r g en es in v o lv in g co mp lex p h y sio lo g ical p ro cesses o r b eh av io rs. Win g s may h av e o rig in ally ev o lv ed b ecau se th ey en ab led an an imal o r in sect to ab so rb o r release h eat, th ereb y reg u latin g b o d y temp eratu re mo re effectiv ely . Wh at are th e th ree reaso n s th ere are n o p erfectly ad ap ted o rg an isms? 1 . En v iro n men ts can ch an g e mo re q u ick ly th an n atu ral selectio n can ad ap t o rg an isms to th em. 2 . All p o ssib le alleles are n o t p ro d u ced b y mu tatio n . 3 . th ere is n o t alway s a sin g le o p timu m ad ap tatio n fo r a g iv en en v iro n men t. Mu tatio n s: 4 facts 1 . All mu tatio n s are ran d o m 2 . Usu ally h av e a n eg ativ e o r n eu tral effect o n th e in d iv id u al 3 . An y ch an g e in th e DNA 4 . Orig in o f all g en etic v ariatio n (To b e p assed o n , th e mu tatio n mu st b e in th e g...
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This document was uploaded on 02/25/2014.

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