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In which of the following animals incomp...

In which of the following animals incomplete alimentary canal is present ?
(1) Aschelminthes
(2) Echinoderms
(3) Chordates
(4) Platyhelminthes

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To determine which of the listed animals has an incomplete alimentary canal, we will analyze each option based on the characteristics of their digestive systems. ### Step-by-Step Solution: 1. **Understanding Alimentary Canal Types**: - An alimentary canal can be classified as complete or incomplete. - A complete alimentary canal has two openings: a mouth for ingestion and an anus for excretion. - An incomplete alimentary canal has a single opening that serves both functions (mouth and anus). ...
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