Theenergy an animal must expend to move uphill is proportional to its bodyweight , whereas the animal’s energy outputavailable to perform this task is proportional to its surfacearea . This is the reason that small animals, like squirrel, can run up a tree trunk almost as fast as they can move on level ground, whereas large animals tend to slow down when they are moving uphill.
Which one of the following is an assumption on which the explanation above depends?
(A) The amount ofenergy needed to move uphill is no greater for large animals that it is for small animals. - WRONG. Proportionality is nowhere given attention or taken care of.
(B) Small animals can move more rapidlythan large animals can. - WRONG. Irrelevant.
(C) The ratio of surface area to body weight issmaller in large animals than it is in small animals. - CORRECT. Precisely what we needed.
(D) There is little variation in the ratio of energy output to bodyweight among animals. - WRONG. If so then the passage
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Which one of the following is an assumption on which the explanation above depends?
(A) The amount ofenergy needed to move uphill is no greater for large animals that it is for small animals. - WRONG. Proportionality is nowhere given attention or taken care of.
(B) Small animals can move more rapidlythan large animals can. - WRONG. Irrelevant.
(C) The ratio of surface area to body weight issmaller in large animals than it is in small animals. - CORRECT. Precisely what we needed.
(D) There is little variation in the ratio of energy output to bodyweight among animals. - WRONG. If so then the passage
...
Statistics : Posted by unraveled • on 07 Jun 2009, 23:45 • Replies 16 • Views 33864
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