Why does the professor mention the expressions "mother tongue" and "motherese"？
A. To prove that mothers are better language role models than fathers.
B. To illustrate how parents provide a support system for language learning.
C. To compare normal speech patterns with the baby talk that parents use.
D. To argue that second language learning is more difficult for adults.
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Why does the author mention young elephants attempts to drink with their trunks in paragraph 4？
A. To argue that elephants must be intelligent in order to use their trunks.
B. To show that baby elephants would surely die without their mothers" help.
C. To provide an example of an instinctual behavior. inherent in elephants.
D. To emphasize how important learning is in the lives of elephants.
All of the following are mentioned in paragraph 2 as criticisms of Grahams original theory
A. Stocks chosen by market trends generally outperform. those chosen by Graham"s methods.
B. Assets do not always retain their original value the way Graham believed they did.
C. Some industries change too quickly to be analyzed the way Graham proposed.
D. Graham focused too much on quantifiable data at the expense of qualitative dat
Look at the four squaresin the passage that indicate where the following sentence can be added to the passage. Elephants will likewise stop when they encounter the skull of another elephant and will touch it with their trunks in the same way that they will touch other living elephants when greeting them. Where would this sentence best fit？
A. (Ａ)
B. (Ｂ)
C. (Ｃ)
D. (Ｄ)
Which of the following sentences best expresses the essential information in the highlighted sentence in the passage？ Incorrect answer choices change the meaning of the sentence in important ways or leave out essential information.
A. Scientists are finding the idea that some traits are naturally selected for their benefits to the species increasingly useful.
B. It is widely accepted by the scientific community that individuals that don"t benefit their species are maladaptive.
C. The human tendency towards altruism is one widely accepted example of a trait traditionally associated with natural selection.
D. The controversy over the idea that traits can be selected based on their benefits to species instead of individuals is inevitabl
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