evolution game

Last update by jocelynbeevis928 on 04/08/2012
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over evolutionary time,many cave-dwelling organisms have lost their eyes.Tapeworms have lost their digestive system. Whales have lost their hind limbs. How can natural selection acount for these losses?
a.natural selection can not acount for losses, only for inovations
b.by the principle of usse and disuse
c. under particular circumstances that persisted for long periods, each of these structures presented greater cost than benefit
d.these organisms had the misfortune to experience harmful mutations which caused the loss of these structures

Answer:
c. under particular circumstances that persisted for long periods, each of these structures presented greater cost than benefit

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