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CBSE Notes 2011-2012


notes : asexual reproduction

1. Fission :
it occurs in unicellular organisms like amoeba.
*in this process , the parent organism simply divides to form two or more new organisms of same species.
It is of two types . >binary fission-division of one cell into two similar or identical cells like amoeba
>multiple fission . In multiple fission many individuals are produced from a single organism.

how do organisms reproduce their copies

*how do organisms create their own species? Ans. The basic event of reproduction is creation of a dna copy . Chromosomes in the nucleaus of any bell contain dna . The dna is the source of information for making proteins . The change in proteins may lead to differentiation in body design of the progeny . Therefore any organism creates two copies of dna which are similar but not identical .


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Sample paper of Marhematics Class Xth-Tushar Chetan

Hai Friends this is last year board question of class Xth .

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Date Sheet X Board

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