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Question
Incomplete alimentary canal is seen in:
Incomplete alimentary canal is seen in:
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Solution
The correct option is B Fasciola
- The alimentary canal of Fasciola hepatica is incomplete. It belongs to the phylum Platyhelminthes. The digestive system begins with a mouth surrounded by the oral sucker, pharynx, oesophagus, and intestine but, it does not terminate in the anus. It relies on extracellular digestion.
- The other organisms mentioned have a complete alimentary canal. Ascaris, Wuchereria, and Rhabditis belong to the phylum Nematoda and hence possess a complete alimentary canal.
So, the correct answer is option A.
- The alimentary canal of Fasciola hepatica is incomplete. It belongs to the phylum Platyhelminthes. The digestive system begins with a mouth surrounded by the oral sucker, pharynx, oesophagus, and intestine but, it does not terminate in the anus. It relies on extracellular digestion.
- The other organisms mentioned have a complete alimentary canal. Ascaris, Wuchereria, and Rhabditis belong to the phylum Nematoda and hence possess a complete alimentary canal.
So, the correct answer is option A.
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