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Choose the odd one out regarding Digestive System :

( a ) Platyhelminthes
( b ) Porifera
( c ) Ctenophora
( d ) Coelenterata (Cnidaria)
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(B) is the right answer.

In Porifera, Digestive System is absent; Coelenterata (Cnidaria), Ctenophora and Platyhelminthes have incomplete digestive system
answered Jan 3, 2014 by pady_1
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