2. 外语
  3. It can be inferred from the passage that the morphogenetic determinants present in the early embryo are______ According to the

It can be inferred from the passage that the morphogenetic determinants present in the early embryo are______ According to the

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问题 It can be inferred from the passage that the morphogenetic determinants present in the early embryo are______
According to the passage, the morphogenetic determinants present in the unfertilized egg cell are which of the following?
选项 A、Proteins bound to the nucleus
B、Histones
C、Maternal messenger RNA’s
D、Cytoplasm
E、Nonbeaded intervening DNA
答案C
解析 C is the best answer. Lines 38-41 in from us that in his study of sea urchins, Gross “found that an unfertilized egg contains substances that function as morphogetic determinants.” Lines 58-60 assert that the “substances that Gross studied are maternal messenger RNA’s,” and in lines 62-63 we learn that these maternal messenger RNA’s can be found in “ a wide variety of organisms.”
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