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Question

In which animal digestive system is incomplete?

A
Wuchereria
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B
Shistosoma
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C
Hirudinaria
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D
Neopilina
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Solution

The correct option is C Shistosoma
Flatworms (Phylum Platyhelminthes) like planaria and tapeworms, are animals with flat bodies that have a defined tail and head. They either have an incomplete digestive system, or in the case of the parasitic tapeworm, has no digestive system, but just absorbs nutrients already digested by its host.
Neopilina phylum Mollusca
Hirudinaria phylum Annelida
Shistosoma phylum ‎Platyhelminthes
Wuchereria phylum Aschelminthes
So, the correct option is 'B'.

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