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Marine biologists have long thought that variation in the

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SVP
SVP
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Joined: 30 Oct 2003
Posts: 1798
Location: NewJersey USA
Followers: 3

Kudos [?]: 29 [0], given: 0

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Marine biologists have long thought that variation in the [#permalink] New post 27 Dec 2003, 13:43
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Marine biologists have long thought that variation in the shell color of aquatic snails evolved as a protective camouflage against birds and other predators. Brown shells seem to be more frequent when the underlying seafloor is dark-colored and white shells more frequent when the underlying seafloor is light-colored. A new theory has been advanced, however, that claims that shell color is related to physiological stress associated with heat absorption. According to this theory, brown shells will be more prevalent in areas where the wave action of the sea is great and thus heat absorption from the Sun is minimized, whereas white shells will be more numerous in calmer waters where the snails will absorb more heat from the Suns rays.

Evidence that would strongly favor the new theory over the traditional theory would be the discovery of a large majority of

(A) dark-shelled snails in a calm inlet with a dark, rocky bottom and many predators

(B) dark-shelled snails in a calm inlet with a white, sandy bottom

(C) light-shelled snails in an inlet with much wave action and a dark, rocky bottom

(D) light-shelled snails in a calm inlet with a dark, rocky bottom and many predators

(E) light-shelled snails in a calm inlet with a white, sandy bottom and many predators
SVP
SVP
User avatar
Joined: 30 Oct 2003
Posts: 1798
Location: NewJersey USA
Followers: 3

Kudos [?]: 29 [0], given: 0

GMAT Tests User
 [#permalink] New post 27 Dec 2003, 18:45
This is Babys R us or Kids R Us question. Anyway I freakedout and chose E. The answer is indeed D
  [#permalink] 27 Dec 2003, 18:45
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Marine biologists have long thought that variation in the

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