1. The primary purpose of the passage is to
A. present a scientific theory that challenges a widely held theory
B. summarize the basis for a large body of scientific research
C. defend an established scientific theory in light of recent criticism
D. express skepticism about the results obtained by a particular researcher
E. compare the results of two particular scientific studies
2. Which of the following best characterizes the organization of the passage as a whole?
A. A position is noted, an alternative to that position is introduced, and then several points in support of the alternative are discussed.
B. A theory is discussed, an inconsistency within that theory is illustrated, and then a recommendation is made for further inquiry.
C. Certain research results are described, the significance of those results is explained, and then a novel interpretation of those results is summarized.
D. A question is posed, a possible answer to that question is suggested, and then evidence is provided to corroborate that answer.
E. A debate is outlined, contrasting viewpoints within the debate are discussed, and then one viewpoint is demonstrated to be correct.
3. According to the passage, Farmer concedes that endothermy provides an explanation for which of the following features shared by birds and mammals?
A. The ability to forage
B. The ability to sustain exercise
C. The instinct to care for offspring
D. Flexibility in habitat usage
E. Body insulation
答案：
A A E
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