直接细胞分裂

In organisms showing ALTERNATION OF GENERATIONS, the gametes may be produced by mitosis in the haploid generation, or by meiosis in the diploid generation and give rise directly to gametes or gamete-producing cells.

在表现出明显世代交替的生物体中，配子可能是由单倍体世代发生有丝分裂产生，亦可由二倍体世代减数分裂直接产生配子体或配子母细胞。

Apospory The devlopment of the gametophyte directly from the cell of a sporophyte, thus bypassing meiosis and spore production.

无孢子生殖：配子体的发育直接来自孢子体的细胞而不经过减数分裂和孢子产生的生殖过程。

Through many times' experiment and research, the writer finds that there are several steps which are very important in the experiment, because they will have a direct influence on whether students can find the cell which is in different period of the karyokinesis under the microscope.

笔者经过多次实验和探索，发现实验中有几个步骤非常重要，它直接关系到学生能否在显微镜下找到处于有丝分裂各期的细胞。

The traits of dedifferentiation and redifferentiation of the explants form H. sampsonii show that the calli the stem and leaf usually form buds at its parietal cells. In the presence of auxin, the parenchyma of the leaf gap at the node is initiated firstly, then, develops blastemata that form buds in a cluster on the node without callus. These show that the various parts ofthe herb differ greatly in cell initiation and organ differentiation.

研究元宝草外植体的脱分化和再分化的特点结果表明，茎段和叶片启动形成愈伤组织，其不定芽通常发生在愈伤组织的周边区，茎节叶腋的叶隙薄壁组织在激素的诱导下启动、分裂，不形成愈伤组织而直接器官分化成芽原基，并在节结处产生一圈成簇的不定芽，表明元宝草不同部位的细胞启动及器官分化调控存在差异。

Nidulans had a phenotype of cytokinesis defect. Sequence analysis showed that SEPH is 42% identical to the serine–threonine kinase Cdc7p from fission yeast. Deletion of sepH resulted in a viable strain that failed to septate at any temperature. This is the first direct evidence for the existence of a functional pathway like SIN in A.

在构巢曲霉中，温度敏感型菌株筛选发现的SEPH与裂殖酵母SIN信号中的丝-苏氨酸激酶Cdc7p具有42%的同源性，它可能是胞质分裂早期所必须的组分之一，当sepH 缺失时，会导致细胞死亡，这也直接证明了构巢曲霉可能也存在和SIN信号相类似的胞质分裂调节途径。

There has been a research indicating that geminin overexpression or cdt1 knockdown decreased the number of mitotically active cells and this effect depended on direct interaction between Geminin and Cdt1 .This balanced interaction of Geminin and Cdt1 is critical for the cell-cycle regulation.

在斑马鱼中研究发现，过量表达Geminin或者降低Gdt1的表达能减少有丝分裂的细胞数量，并且这种对细胞周期的效应直接取决于Geminin-Cdt1的相互作用，总之，Geminin和Cdt1的相互作用对细胞周期的调节非常重要。

In addition, VEGF is a selective mitogen for endothelial cells, and may directly stimulate cell proliferation.

实验发现，VEGF通过与其受体作用既可以提高血管通透性，有利于血浆蛋白外渗，又可有选择地直接作用于血管内皮细胞，刺激其分裂增殖。

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。