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Q.

The body plan in which the alimentary canal has a single opening is known as?

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a

Tube within tube plan.

b

All the given options.

c

Cell aggregate body plan.

d

 Blind sac body plan.

answer is B.

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Detailed Solution

In a blind sac plan body has only single cavity.

It works as a gastrointestinal tract and coelom.

Cell aggregate body plan is found in simpler organisms.

The alimentary canal has a single opening as both mouths for ingestion and the anus for egestion. 

 

Hence, option B is the correct answer.

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