细胞分裂

Genetic diversity in 12 populations of apomictic Eulaliopsis binata was evaluated by morphological observation and RAPD analyse ,as a result, 12 populations of E.binata were divided into different types.

通过分析龙须草核型和观察花粉母细胞减数分裂过程中染色体行为与变异，判断其倍性水平和多倍体类型。

It is the first time that these phenomena were observed: Two nuclei are surrounded by plasma and locate at the central of the female gametophyte and the others nuclei are positioned at the fringe of the female gametophyte; Before the pollen tube enters the female gametophyte. the nuclei in chalazal end begin splitting of plasma and form multinuclear cell.4. The pollens of Gnetumc are spherical or applanate with single aperture. The ornamentation of exine is spine. The basis part of spine is lenience and the top part of spine is tip or obtuse sphere.

首次在买麻藤属植物的雌配子体中观察到2个游离核位于配子体的中央位置，且被一团原生质所包围的，其余的游离核位于边缘的现象以及花粉管进入雌配子体前，合点端的核已经发生胞质分裂形成多核细胞的现象 4、买麻藤的花粉近球形或扁平型，有单萌发孔，外壁表面具小刺状纹饰，小刺基部宽大，末端尖或钝圆。

Or they may do so asymmetrically, and give rise to two very different daughters.

干细胞也可进行不对称分裂，产生两个完全不同的子细胞。

Ingestion of bacterially expressed dsRNAs can produce specific and potent genetic interference in Caenorhabditis elegans.

考虑主要是由于分裂后的原代培养神经元转染效率低，且转染本身对神经元就是一个细胞毒性作用所致。

The cambial cells ceased to divide to produce secondary phloem cells at the end of July, but contineous to produce secondary xylem tissues until mid-August.

杜仲枝条中形成层在3月份开始恢复活动，同时产生木质部和韧皮部。7月底形成层细胞停止分裂，同时停止产生韧皮部，8月中旬停止产生木质部。

Because at that stage cells are very potential this fused embryo cand develop into a baby.

由于此时的细胞有极强的分裂性和潜能。融合后的胚胎就发展成一个孩子。

It is intimately involved in spindle formation and chromosome segregation during mitosis. Now, the over-expression of PLK1 has been found in various primary carcinomata, and indicated the probability of PLK1 as a new tumor marker.

近年来，研究发现PLK1（polo-like kinase 1）基因在有丝分裂过程中起重要的调节功能，并且在多种的人类肿瘤包括肺癌中发现PLK1基因表达升高，提示PLKl的增长表达在细胞的增殖中起重要作用，预示PLK1可能是一个新的肿瘤标记物。

Mature pollen grain is of 2 - celled type .

花药壁的发育为基本型，小孢子减数分裂为连续型，小孢子四分体为四面体型，成熟花粉为二细胞型。

A star-shaped structure formed in the cytoplasm of a cell and having raylike fibers that surround the centrosome during mitosis.

在细胞浆内形成的星状结构，在有丝分裂期间有棱形纤维环绕中心体。

Non-mitogenetic acidic fibroblast growth factor ; Re ceptor ; Signal pathway

非促分裂人酸性成纤维细胞生长因子；受体；信号通路

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了