How does macrospore developed to embryo sac?
大孢子如何发育成胚囊？
Megasporogenesis and Female Gametogenesis: Archesporium is of one cell, it directly functions as macrospore mother cell.
大孢子和雌配子体发生：孢原为一个细胞，它直接起大孢子母细胞功能。
Megasporogenesis and Female Gametogenesis: Archesporium is of one cell, it directly functions as macrospore mother cell.
大孢子和雌配子体发生：孢原为一个细胞，它直接起大孢子母细胞功能。
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