there are some things i don't understand about evolution.
one, how do complex systems, such as vision, evolve? like, isn't the visual system composed of a plethora of moving parts like rods and cones and lenses? if the visual system doesn't work without so many different parts working together, then how would the ability to collect and interpret visual stimuli ever get off the ground?
two. if a creature develops a beneficial genetic mutation, why doesn't it require a mate with the same mutation to reproduce this trait? what determines whether a mutation becomes a dominant trait?
2007-05-21
21:02:27
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10 answers
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asked by
Anonymous
in
Biology