更多macrospore例句

1. But the formation of the macrospore or embryo-sac is simpler than the corresponding process in cryptogams.
2. The larger ones contain each a large spore, or macrospore; the smaller contain numerous microspores, immersed in mucilage.
3. The macrospore divides into two cells, a large lower one, and a smaller upper one.
4. The nucellus is a cellular tissue enveloping one large cell, the embryo-sac or macrospore.