1.

Differentiate complete and incomplete digestive system. 

Answer»
S.NoDigestive System.Incomplete Digestive System.
Digestive system of Platyhelminthes has only a single opening to the exterior which serves as both mouth and anus, and hence called an incomplete digestive systemFrom Aschelminthes to Chordates, all animals have a complete digestive system with two openings, the mouth, and the anus.



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