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Regarding Class – Cyclostomata : 1. Cyclostomes are marine 2. But they migrate to fresh water for spawning . 3. After spawning, they die within a few days. Regarding 1,2 and 3:

( a ) 1 is incorrect but 2 and 3 are correct
( b ) All are correct
( c ) 2 is incorrect but 1 and 3 are correct
( d ) 3 is incorrect; 1 and 2 are correct

1 Answer

(B) is the right answer.

Class – Cyclostomata : Cyclostomes are marine but migrate for spawning to fresh water. After spawning, within a few days, they die. Their larvae, after metamorphosis, return to the ocean
answered Mar 20, 2014 by pady_1
 

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