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embryo sac中文是什么意思

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用"embryo sac"造句"embryo sac"怎么读"embryo sac" in a sentence

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  • 【植物;植物学】胚囊。

例句与用法

  • Starch grains present in the embryo sac and placenta are utilized by the embryo .
    存在于胚囊和胎座中的淀粉粒为胚胎所利用。
  • The embryo sacs observation is one of the main study method for embryology
    摘要胚囊观察是植物胚胎学的主要研究方法之一。
  • Bisporic embryo sac
    双孢胚囊
  • Frequencies of apomictic embryo sacs were the highest in winter and summer respectively in two years
    两年中,无融合生殖胚囊出现的频率分别在冬季和夏季最高。
  • It is concluded that embryo sac sterility was the main reason for highly stable seedless characteristic of lipeng no . 2 cultivar
    因此,胚囊高度败育是丽? 2号产生无核的主要原因。
  • Observation by paraffin section showed that lipeng no . 2 embryo sac mother cells were almost entirely degenerated during megasporogenesis
    切片观察发现,丽? 2号胚囊母细胞在四核期已完全退化。
  • Enclosure of the nucellus by the integuments is incomplete , the embryo sac or , in gymnosperms , to the archegonium
    珠被并不是将珠心完全封闭,而是留有珠孔以便受精时花粉管进入胚囊,或裸子植物的藏卵器。
  • After we learnt enzymatic isolation method of yang hong - yuan and zhou chang , we explored to develop a pressure cover glass method of observation on embryo sacs
    我们在学习了酶解法之后,摸索研究了一种观察甜菜胚囊的压片法。
  • Illiensis type and t . tetraphylla type . there are more than one types of embryo sac in 3 species , sush as t . illiensis , t . heteropetala and t . heterophylla
    在所报道的5组共45种郁金香属植物中,发现该属植物的胚囊发育类型具有一定的系统学意义。
  • Antipodal cells the three haploid cells found in the embryo sac of seed - bearing plants that migrate to the chalaxal end of the sac farthest from the micropyle
    反足细胞:胚囊三次分裂形成卵细胞,助细胞和极核等,其中位于合点端的三个单倍体细胞称反足细胞。
  • 更多例句:  1  2
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