Kuo in the August 10, 2000 edition of 'Nature' that sea urchin sperm contains an enzyme that synthesizes nitric oxide gas; How raising nitric oxide within an egg activates the cell's development; Question of whether the sperm of other animals, including people, use nitric oxide as a signal...
1.A sperm cell develops from a sperm mother cell. 精细胞从精母细胞发育而成. 2.How can an X chromosome be nearly as big as the head of the sperm cell? 染色体怎么会接近性子头部的大小? 3.The vaccine works by blocking male sperm cell from joining female egg cell. ...
Cytoplasmic nucleoids in the generative cell of mature pollens, sperm cells of pollens cultured in vitro and egg cell of mature embryo sac in Calystegia hederacea Wall, were studied by means of the DNA fluorochrome DAPI in conjunction with epifluorescence microscopy for in situ detection of cyto...
Why is '-ed' sometimes pronounced at the end of a word? Popular in Wordplay See All Terroir, Oenophile, & Magnum: Ten Words About Wine 8 Words for Lesser-Known Musical Instruments 10 Words from Taylor Swift Songs (Merriam's Version) ...
英文写细胞的作用,结构 请用英文写出下列细胞的作用以及结构对作用的影响? musclecellnervecellredbloodcellepithelialcelleggcellspermcellwhitebloodcell邓晓飞回答: Thecellisthebasicstructural,functionalandbiologicalunitofallknownlivingorganisms.Cellsarethesmallestunitoflifethatisclassifiedasalivingthing,andareoftencalled...
Sperm, male reproductive cell, produced by most animals. In higher vertebrates, especially mammals, sperm are produced in the testes. The sperm unites with (fertilizes) the ovum (egg) of a female to produce a new offspring. Mature sperm have two distingu
sperm强调是精子，而semen则更强调是精液及富含精子生存所需要的营养物质。sperm：n. 精子；精液；鲸蜡油 复数 sperms或sperm semen：n. 精液；精子 n. (Semen)人名；(罗、土)塞门；(俄)谢苗 复数 semens或semina 英语字母与拉丁字母现代英语所使用的拼写字母，也是完全借用了26个字母。所谓“英语字母...
拖放文件 立刻翻译 ▾ 外部资源(未审查的) The results showed that the frozen-thawed treatedgoatsperm cellsweremore efficient and more reliable than untreated sperm [...] actazool.org actazool.org 结果表明,冻精显著提高了结合和内化外源DNA的效率(81.60%±16.59% ...
The fusion of a sperm cell with an egg cell is the very first step in the process that leads to new individuals in sexually reproducing species. Fundamental as this process may be, scientists are only now beginning to understand the complexities of how it works. ...
请用英文写出下列细胞的作用以及结构对作用的影响?muscle cell nerve cell red blood cell epithelial cell egg cell sperm cell white blood cell 扫码下载作业帮搜索答疑一搜即得 答案解析 查看更多优质解析 解答一 举报 The cell is the basic structural,functional and biological unit of all known living ...