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| Cell Division |
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| Cell division forms a mode of reproduction in unicellular organisms. In multicellular organisms it is responsible for embryonic development and growth of the adult organism. It is also involved in repair and regeneration. Both asexual and sexual reproduction requires cell division. |
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| There are two types of cell division in eukaryotes namely Mitosis , the equational division and Meiosis ,the reductional division. |
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| There is another type of cell division seen in primitive organisms, called amitosis. It is a simple type of cell division in which the nucleus just elongates and splits into two. Hence, it is also called direct nuclear division. The two resulting daughter cells receive approximately equal amount of nuclear and cytoplasmic materials. |
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| Amitosis occurs during binary fission in some protozoans. In Paramecium, the meganucleus divides by amitosis during binary fission. |
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