angiosperm的例句大全

Most angiosperm ovules possess two integuments, while gymnosperms usually have only one.

大多数被子植物的胚珠有两层珠被, 而裸子植物通常只有一层.

This latter statement finds support in contemporary works on angiosperm embryology.

后者这一说法,在当代被子植物胚胎学研究中获得了支持.

Chalaza ( pl . chalaxae or chalazas ) The region of an angiosperm ovule where the nucellus and integuments merge.

合点 :被子植物胚珠上的一个区域,在合点处珠心和珠被愈合.

Self-incompatibility, a common biological phenomenon in angiosperm, is an important protective mechanism of preventing close breeding and species retrogression that formed during long period evolution.

自交不亲和性是被子植物中常见的一种生物学现象，是植物在长期进化过程中形成的防止近亲繁殖和物种退化的一种保护机制。

New techniques and approaches used in systematics and identification of Angiosperm

被子植物系统分类与鉴定的新方法

In some angiosperm the seeds are equipped with gossamer wings, like the dandelion and milkweed seeds.

有些被子植物的种子有蛛丝般的翅膀，例如蒲公英和乳草属植物的种子。

Functions of Calcium during fertilization of angiosperm is one of research focuses for botanists.

钙在被子植物双受精过程的作用一直是植物学家的兴趣热点。