“大孢子”造句

心皮是由大孢子叶两边愈合进化而来的.
It has evolved by fusion of the two edges of the megasporophyll.

孢子异型:指植物产生两种大小不同的孢子: 小孢子和大孢子.
Heterospory The production of two different sizes of spore: microspores and megaspores.

通常较大的大孢子含有更多的贮藏养料.
The larger megaspores usually contain more food reserves.

• #大孢子