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由单细胞生物到多细胞生物，在进化史上是一个飞跃，但在时间上并不需要漫长的岁月。单细胞生物进行有丝分裂时，藕断丝连，就形成了多细胞生物。今天仍有一些细菌是双球体、四球体、链球体和葡萄球体，这些就是最原始的多细胞生物。It is a great leap forward in the evolutionary history from the unicellular organisms to the multicellular organism. When the unicellular organisms conduct the mitotic recombination, their relations are not entirely severed, thus forming the multicellular organism. And even today there are some bacteria in the form of Double Sphere, quaternary sphere, streptococcal sphere链球体, hydatidiform sphere, and these are the most primitive multicellular organism.
由单细胞生物到多细胞生物，是进化史上的一个飞跃，但在时间上并不需要漫长的岁月。单细胞生物进行有丝分裂时，形成胞间联丝，由此形成了多细胞生物。今天仍有一些细菌是双球菌、四球菌、链球菌和葡萄球菌，这些就是最原始的多细胞生物。 From single cells to multicellular organisms, is a leap in the history of evolution, but the timing does not need a long period of time. In a single biological cell mitosis, the formation of intracellular plasmodesmata, which resulted in many cells. Today, there are still some meningitidis bacteria, four cocci, streptococcus and staphylococcus, which is the most primitive multicellular organism.
It is a great leap forward in the evolutionary history from the unicellular organisms to the multicellular organism. This leap didn't take a long time. While nicellular organisms conduct mitosis, if intracellular plasmodesmata was formed and retained, multicellular organism would be formed at once. Today, some dipococcus, four cocci, streptococcus and staphylococcus still exist. They are indeed the most primitive multicellular organism 当单细胞生物进行有丝分裂时, 如果形成的胞间联丝被保留, 多细胞生物就形成了.这句话是我根据前文改写的, 不一定对阿!
[ Last edited by elizer at 2007-1-29 09:32 PM ]