皮皮学，免费搜题
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搜题
【单选题】
女性进入青春期的重要标志是A.
声调增高
B.
乳房发育
C.
腋毛生长
D.
月经来潮
E.
子宫增大
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皮皮学刷刷变学霸
举一反三
【简答题】生产力对教育的决定作用表现在（ ）
【单选题】The passage suggests that Mendel's experiments succeeded because
A.
Mendel discovered flaws in his research design and corrected them
B.
Mendel had a thorough understanding of the concept of linked traits
C.
the scientific community finally understood the connection between mathematical computations and heredity
D.
the traits in peas happen to reappear in a distinct and predictable way
【简答题】简述Mendel、Morgan和Waston等人对分子生物学发展的主要贡献。