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Old Tuesday, April 06, 2010
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Describe fission as a method of reproduction.

ANS :Fission occurs in unicellular organisms. Binary fission and multiple fission are its two types.

BINARY FISSION :


* An organism produces two unicellular organisms identical to the parent cell through mitotic division.
* Amoeba, paramoecium, etc. reproduce by binary fission.



MULTIPLE FISSION :


* Under certain circumstances, the nucleus of a cell divides several times within the cell forming many nuclei.
* Each nucleus is then surrounded by cytoplasm to form a separate unit.
* All these newly formed cells then come out of the mother cell(parent cell) by breaking the wall and behave as a new organism.
* Plasmodium, amoeba, paramoecium, etc. exhibit such reproductive event.
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Short notes & explanation-amoeba01.jpg   Short notes & explanation-multifission.jpg  
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