细胞分裂

The relationship between the proterozoic Era and explosive evolution of the life on the Cambrian period was preliminary explored by an Ecological and Evolutionary approach in this paper.

距今38亿年前地球最早生命诞生以来，至元古代早期第一个真核细胞开始出现；从无性分裂或出芽繁殖的原核生物到有性繁殖的真核单细胞生物以及从单细胞的原生动物到真核多细胞的后生动物的进化，无疑是生命进化过程中非常重要的事件。

Sinense, the spores germinate inside their exospores and then divide into massive protonemata;the massive protonemata can form two kinds of protonemata of which one is clubbed protonema with papillae,and the other is caulonema composed of long and cylindrical cells ; the gametophyte archaeocytes only occur on the massive protonemata.

结果表明：中华缩叶藓的孢子在壁内萌发，随后分裂产生块状原丝体；块状原丝体上可产生两种丝状体，一种是具疣的棒状原丝体，另一种是由长圆柱状细胞组成的轴丝体；配子体原始细胞只产生于块状原丝体上。

With little water, it shed frequently as scurf. The layer also restrains normal growth of new epithelia and accordingly new skin.

由于脱落角质层的覆盖，限制了皮肤表皮细胞正常有丝分裂出新的细胞，难已形成活跃白嫩皮肤。

Chromosome pairing behavior in meiosis of the hybrid F1 was carried out. Results showed that in an average , 1.25 rod bivalents were observed in one PMC, meiotic configuration was 2n=14=11.49Ⅰ+1.25Ⅱ(Xta=1.25) and most of PMCs possessed 1～5 bivalens, indicating that the relatively high homeology was detected between the D genome of Ae.tauschii and the V genome of D.villosum. The morphological differences between F1 hybrids and their parents were significant. F1 plants were highly self-sterile, but partially self-fertile after treated by chromosome doubling technique.

对杂种F1花粉母细胞减数分裂中期Ⅰ染色体配对行为进行观察发现，"节节麦×簇毛麦"杂种F1平均每PMC有1.25个棒状二价体，染色体的平均构型为2n=14=11.49Ⅰ+1.25Ⅱ(Xta=1.25)，大部分被观察的细胞出现1～5个二价体，表明节节麦D染色体与簇毛麦V染色体间具有相对较高的部分同源配对， D和V染色体之间存在一定的部分同源性。F1植株高度自交不育，经染色体加倍处理后能够自交结实。

Development of mature sperm from the testes of normal seminiferous tubules, by a special cell - spermatogonia after splitting from the development.

成熟的精子来自发育正常的睾丸曲细精管，由一种特殊细胞——精原细胞几经分裂发育而来。

They were expressed abundantly in the spermatogonia cells but decreased markedly when the cell grew into the meiotic spermatocyte stage.

它们在睾丸精原细胞中有高表达，但到精母细胞进入减数分裂时则mRNA水平迅速降低。

These findings lead to an MSAP/septin-mediated model for flagellar differentiation during spermiogenesis.

免疫萤光定位分析显示septin7与MSAP共同位於精虫鞭毛的基底体上。septin蛋白家族可能参与细胞质分裂及细胞形态生成等事件，因此推测MSAP/septin复合体的功能可能涉及鲤鱼精细胞之极性建立及鞭毛形成。

Results Microscopically,the tumor was composed of spindle-shaped cells and the cells were obviously atypical.M...

结果肿瘤主要由梭形细胞构成，细胞排列紧密，异型性明显，分裂相易见伴大片坏死及玻璃样变。

Decreased rate of cell proliferation, split-phase cells decreased significantly.

细胞增殖速度明显下降，分裂相的细胞明显减少。

Each cell lives for a length of time,and then splits to form two babies.

每个细胞存活一定的时间后，就会分裂成两个新的子细胞。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。