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Question
The main topic of the passage is:
Options:
A .  the main contribution of modern embryology to molecular biology
B .  the role of molecular biology in disproving older theories of embryonic development
C .  cell determination as an issue in the study of embryonic development
D .  scientific dogma as a factor in the recent debate over the value of molecular biology
Answer: Option C
:
C
C is the best answer. In identifying the main topic of the passage, you must consider the passage as a whole. In the first paragraph, the author provides a historical context for the debate described in the second paragraph, concerning when and how the determination of embryo cells takes place. The third and fourth paragraphs provide a specific example of the “Recent discoveries in molecular biology” (lines 28-29) that may lead to the resolution of that debate.

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