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apical placentation

n. where one or few ovules develop at the top of a simple or compound ovary

1、顶生胎座

顶生胎座(apical placentation)：胚珠着生于子房顶部而悬垂室中，如桑。基生胎座与顶生胎座可能源于特立中央胎座的大部分消失，也可能源于侧膜胎座的大部分简化...

2、[植]顶生胎座式

5 顶生胎座式（apical placentation ）：心皮不定，子房 1 室，胚珠着生于子房顶部。如桑、榆。

3、顶生胎座式

...apical axis 顶轴,纵对称轴...apical placentation 顶生胎座式apical organ 顶器 ...

生物学

n.where one or few ovules develop at the top of a simple or compound ovary

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