Although dead cells can play important roles, the growth of a multicellular organism depends on cell division. As you know, all muticellular organism, regardless of size, start as a single cell. A relatively small number of consecutive cell division can eventually change a single cell into an organism with many billions of cells. For example, if a cell and its descendent continue through 50 consecutive divisions, more than trillion cells result.As you can see in the Biotechnology box on page 42, cell divisions can have important implications for plant biotechnology. In this section, we will look at how cell division is involved in the growth and reproduction of a eukaryotic organsim. 雖然死細胞扮演著重要的角色 但植物成長仍然靠著細胞分裂 如同你所知 不論大小 所有的多細胞生物都是由一個細胞分裂而來 一個相對少量的連續細胞分裂可以使單一細 胞分裂至百萬個細胞 例如一個細胞和他的次生細胞分裂五十次 便會產生十億個細胞 另外我們在Biotechnology Box提到細胞分裂是生物技術中一個非常重要的應用 這一節我們會提到真核生物生長與生殖與細胞分裂的關係 --

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