At this point esch chromosome consist of a pair of chromatids and the two associated chromosomes are termed a tetrad.此时每条染色体由一对染色单体构成,这两条联合的染色体称为四分体.Microspore abortion occurred after the tetrad formation.小孢子败育发生在四分体形成以后...
Megaspore tetrad is linear. The chalazal megaspore develops into an embryo sac of Polygonum type.大孢子四分体为线形, 合点端功能大孢子发育成为蓼型胚囊.The chalazal megaspore of a linear tetrad develops into a polygonum type sac.四分体线行排列,合点端的大孢子发育为...
The review body has produced a truncated version of its annual report.该评论机构出版了其年报的删节版本。My article was published in truncated form.我的文章以节录的形式发表了。Oligocene erosion had truncated the sediments draped over the dome.覆盖于穹丘上的沉积...
It was in these studios that young painters found the support and stimulating competition of peers.就是在这些画室里，年轻的画家们得到了同龄人的支持，也感受到了激励大家向前的竞争。The gallery has mounted an exhibition of art by Irish women painters.画廊已举办了一场爱尔兰女...