Multiple choice

Alimentary canal is absent in:

  1. Cestoda

  2. Gastropoda

  3. Nematode

  4. Pelecypoda

  5. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cestodes (tapeworms) lack an alimentary canal as they absorb nutrients directly through their body surface from the host's intestine. Gastropods and Pelecypods (mollusks) have complete digestive systems. Nematodes like Ascaris have a straight alimentary canal.

Keep practicing — related questions