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【简答题】
细胞学说 主要由德国的植物学家施莱登和动物学家施旺共同建立 ,其主要内容为: (1)细胞是一个有机体,一切 细胞发育而来,并由细胞和 所构成。 (2)细胞是一个 的单位,既有它自己的生命,又对与其他细胞共同组成的整体的生命起作用。 (3)新细胞可以从老细胞中产生。 (注意其修正过程――课本阅读内容)
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