nucellar embryony

• 心层生胚,珠心芽生,珠心胚现象

nucellar embryony的用法和样例：

例句

1. The nucellar embryo had a suspensor,its development passed through the similiar stages of the zygotic embryo.
   珠心胚发育经历与合子胚相同的发育阶段。