PT 30, section 2, #22

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Maye
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PT 30, section 2, #22

Postby Maye » Thu Sep 01, 2011 9:37 pm

This is a question about the sections in a rattlesnake's tale.

The answer to this is (E): Rattlesnakes molt as often when food is scarce as when they do when food is plentiful.

Can someone explain this answer to me please? I don't see how this has to do with anything in the stimulus at all.

clee33
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Re: PT 30, section 2, #22

Postby clee33 » Thu Sep 01, 2011 9:53 pm

If they molt at different rates depending on outside circumstances, then the molting might not be at a constant rate, and thus not a reliable determinant of age.

Say you have a rattlesnake that lives in the desert. It molts three times a year there. Then you take it to a bunny farm and let it go crazy. It gets so fat that it has to molt nine times a year there. So it has molted 12 times in 2 years. Based on the desert rate, it should be 4 years old, but based on the farm rate, it's only a little over a year old. In reality it's neither of these ages.

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Maye
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Re: PT 30, section 2, #22

Postby Maye » Thu Sep 01, 2011 10:44 pm

Thanks. It does make sense, I guess. I was thinking about the constant rate of molting, too, but I was thrown off by the first answer choice about the snakes molting once a year.




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