选择题:珠柄、珠孔、合点在一条直线上的胚珠是( )。A.直生胚珠B.弯生胚珠C.横生胚珠D.倒生胚珠

题目内容:

珠柄、珠孔、合点在一条直线上的胚珠是( )。
A.直生胚珠
B.弯生胚珠
C.横生胚珠
D.倒生胚珠
参考答案:

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