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At fertilization one male nucleus fuses with the gee nucleus to form the zygote, while the second male nucleus fuses with the primary endosperm nucleus to form a triploid cell, or more rarely a second diploid or a pentaploid cell that later gives rise to the ENDOSPERM.

受精作用发生时,一个精核与卵核融合形成受精卵,第二个精核与最初乳核融合,形成三倍体细胞,偶而也形成第二个二倍体或五倍体细胞,三倍体细胞最后发育为乳。

The result showed that pericarp thickness was significantly different among different varieties and among different days after pollination.

结果表明,不同品种和不同授粉天数的果皮厚度差异明显;同一品种籽粒内不同部位间的果皮厚度也有较大差异,这种差异在灌浆前期更为明显,主要表现为背面的果皮较面薄,之后这种差异逐渐缩小。

Constant embryonic tooth development began in the first 4 weeks to 9 months to form, the lower total of 28 permanent tooth germ.

恒牙的发育始于胎第4周,至第9个月形成上、下颌共28个恒牙牙

Plumule The shoot apex and first rudimentary leaves in the mature embryo and the seedling .

芽:在成熟和幼苗中,枝的顶端长出的第一片未发育的叶。

Some injected oocytes were activated by Sr(superscript 2+) after various incubation periods and observed for formation of a second polar body and pseudo-polar body.

在注射后的不同培养时间,对重构卵子以Sr(上标 2+)激活,观测第二极体和类极体的形成,同时对重构进行染色体计数,并将发育良好的重构进行输卵管移植。

Double fertilization The fusion of one pollen nucleus with the egg to form the zygote and of the other pollen nucleus with a polar nucleus to form the triploid endosperm nucleus.

双受精:指花粉粒中的一个精子与珠中的卵细胞结合形成受精卵,另一个精核与极核结合形成三倍体的乳核。

The factors affecting the seed-set rate ofintersubspecific hybrids include embryo sac sterility,pollen sterility,anther dehiscence and non-synchronization of male and female sexual organsdevelopment in the same spikelet.

对水稻亚种间杂种及其稳定的多品系SB-1进行了细胞学、胎学和遗传学研究,主要结果如下:1、影响杂种低结实率的因素包括囊败育、花粉败育、花药不开裂和雌雄性器官发育进程不一致。

Well, certainly saw the embryo inside the uterus Xiang, embryo and fetal heart rate Pollex Mobile Holdings, which is a living, small life, of course, should not give up Baotai, progesterone production has tocolysis effectiveness of security, commonly used in the treatment due to luteal phase defect and caused by the threatened abortion and habitual abortion to good effect.

那么一定看到了子宫内的襄、芽和胎心博动,也就是一个活生生的,小生命,当然不应放弃保胎,黄体酮有安胎保产功效,常用于治疗由于黄体功能不全而致的先兆流产和习惯性流产,效果良好。

The tree's seeds develop in parts of the flowers known as ovules, and the pollinator lays her eggs into some of these ovules.

这棵树的种子发展地区的花卉被称为珠,并奠定了她的授粉鸡蛋到其中的一些珠。

Most pollinator wasp eggs are found in the inner ovules, whereas most fig seeds develop in the outer ovules.

大多数授粉蜂卵中发现的内部珠,而大多数无花果种子开发外珠。

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Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书,王祥生,李德昌。安徽省首次发现嗜群血蜱。

Chapter Three: Type classification of DE structure in Sino-Tibetan languages.

第三章汉藏语&的&字结构的类型划分。