Critical Reasoning (CR) | Re: ­Under laboratory conditions, fruit flies can learn to respond

­Under laboratory conditions, fruit flies can learn to respond to odors that elicit no response from them in nature. Mutant fruit flies that cannot produce a certain enzyme are, however, incapable of such learning. These mutant flies respond to other odors just as ordinary fruit fliesdo. Thus it is unlikely that the enzyme's absence impairs the fruit flies' perception of odors, since presumably fruit flies would not have an enzyme that was needed only for the perception of odors that fruit flies do not respond to innature. Given that many researchers believe that this enzyme is somehow involved in the process of forming memories, what the enzyme's absence probably impairs is the fruit flies' ability to learn.
In the argument given, the two boldfaced portions play which of the following roles?
A) The first is an explanatory hypothesis provisionally put forward in the argument; the second provides evidence in support of that hypothesis.
B) The first is evidence that has been used to
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Statistics : Posted by siddd30 • on 08 Mar 2024, 08:32 • Replies 3 • Views 1771

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