aplacental
「aplacental」的意思
adj. [动] 无胎盘的
adj.(低等哺乳动物)无胎盘的(如袋鼠)
「aplacental」的用法
aplacental无胎盘的 - 生物学
「aplacental」的例句
The fish has no placenta.
这条鱼没有胎盘。
Placental mammals give birth to live young.
胎盘哺乳动物会产下活体幼崽。
Some reptiles are aplacental.
一些爬行动物是无胎盘的。
The lack of a placenta can lead to developmental issues.
没有胎盘可能导致发育问题。
Aplacental mammals include monotremes and marsupials.
无胎盘哺乳动物包括单孔目和有袋目。
Placental development is a crucial step in embryology.
胎盘发育是胚胎学中的关键步骤。
Some birds are aplacental, such as ostriches and emus.
一些鸟类是无胎盘的,如鸵鸟和鸸鹋。
The absence of a placenta in some animals can be traced back to their evolutionary history.
一些动物缺乏胎盘可以追溯到它们的进化历史。
Aplacental mammals have different reproductive strategies compared to placentals.
无胎盘哺乳动物与胎盘哺乳动物在繁殖策略上有所不同。
Some insects, like aphids, are considered aplacental because they lack a true placenta.
一些昆虫,如蚜虫,被认为是无胎盘的,因为它们缺乏真正的胎盘。