why must large organisms be multicellular
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why must large organisms be multicellular
题目中文意思指(大型生物为什么必须多细胞?)
题目中文意思指(大型生物为什么必须多细胞?)
原因很多,这个问题其实就是在问为什么单个细胞不能无限制的长大.首先大型生物如果是单细胞的话,细胞骨架承受的压力会非常大,无法支撑整个细胞.其次就是细胞越大,表面积和体积比就越小(比如说一个边长3的正方体,体积是27,表面积是54;而如果边长为10,则体积为1000,表面积600,比值变小了),而细胞是通过细胞膜传递营养的,也就是说细胞越大,吸收营养越困难.还有其他很多原因
must的否定句?A large hole must be dug.(否定句)A large hole ______be
must be a reason why的歌词
Must Be A Reason Why中文对照
从句分析 there must be another reason why people be
She must be the reason why God made a girl
英语翻译she must be the reason why good made the
英语翻译"Avoid the rush-hours" must be the slogan of large citie
英语翻译We know why not,of course.It's be-cause,in large consume
I would like to be a single-cell organisms,heartless creatur
The most adaptable organisms will be able to survive in the
why must you
用适当的形容词或副词填空(首字母已给出) 1. A large number of mouths must be fed