QUESTION 11 Which of the following animal groups would you expect to have a compartmentalized alimentary...

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Answer 1

Answer #1

QUESTION 11.

Option A:- Incorrect

Reason:- Porifera are the simplest diploblastic, asymmetrical animals. They do not have an alimentary canal instead they have a canal system containing minute small pores called ostium from where water enters the central cavity spongocoel.

Option B:-CORRECT

Reason:- In arthropods the alimentary canal is divided into several parts in order to perform different functions individually. The entire digestive system is divided into 3 parts: Foregut, midgut, and hindgut.

Option C: Incorrect

Reason:- Scyphozoa belongs to class cnidaria they are a triploblastic, radially symmetrical simple organism. They are also called true jellyfish. They have a primitive digestive system with no compartmentalization.

Option D:- Incorrect

Reason:-They belong to class cnidaria have a primitive digestive system with no specific organs.

Option E:- Hydrozoa

Reason:-They belong to class cnidaria and have a primitive digestive system with mouth and simple gastrointestinal cavity. They do not have specific organs and compartmentalized digestive system.

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