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In Sponges : 1. Eggs and sperms are produced by different individual. 2. Fertilisation is external 3. Development is indirect having a larval stage which is morphologically similar to the adult. Regarding 1,2 and 3:

( a ) 3 is correct but 1 and 2 are incorrect
( b ) 1 is correct but 2 and 3 are incorrect
( c ) All are incorrect
( d ) 2 is correct but 1 and 3 are incorrect
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(C) is the right answer.

In Sponges : Sexes are not separate (hermaphrodite), i.e., eggs and sperms are produced by the same individual. Sponges reproduce asexually by fragmentation and sexually by formation of gametes. Fertilisation is internal and development is indirect having a larval stage which is morphologically distinct from the adult.
answered Jan 6, 2014 by pady_1
 

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