Reading passage 2 answer
Intelligent people are often said to have big brains. This should not be taken literally. If
brain size were the cause of intelligence, we should expect elephants to be the planet’s
Rather, our intelligence is
a result of the dense and complex
neural network of the human brain.
The disproportionately large human brain is no
accident, however: the constancy of cell size means that a certain cranial capacity is
Indeed, a large cranial volume is paramoun
t to allow for an advanced
neural network to develop.
Brain size should thus be considered a prerequisite for
intelligence rather than its cause.
In the argument given, the two sentences in bold play which of the following roles?
The first cites a general
rule; the second points out an exception to that rule.
The first makes a hypothesis; the second provides evidence confirming this
The first makes an observation; the second proposes an explanation for this
The first makes a crucial
claim; the second links this claim to the main idea
of the passage.
The first identifies a common argument; the second contradicts this argument.
(D) is the credited response.
The first few sentences draw a clear distinction
between brain size and intelli
first bolded sentence follows the elephant comparison, which underscores this “crucial
claim” made by this sentence. Only (D) fits the sequence.
(A) is incorrect. The main topic of this passage is brain size and its relation to
the first bolded sentence, the author makes a claim that is central to his
argument: “our intelligence is the result of . . .” This is certainly not a general rule, so
In the second bolded sentence, he explains what this claim has to do with
(B) is incorrect. There is no evidence provided by the passage, so (B) is incorrect.
(C) is incorrect. Although the first bolded sentence may be seen as an observation, the
second bolded sentence doesn’t explain the first. (The second bolded s
entence offers an
explanation for the unbolded sentence that immediately precedes it.)
(E) is incorrect. Despite the presence of the word however, in another sentence there is no
contradiction between the two bolded sentences, so choice(E) is incorrect.