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Phylum Annelida

Assertion :Th...

Question

Assertion :The coelomic cavity of a leech is mostly filled with botryoidal tissue formed of branching tubular cells. Reason: Hence, the coelomic cavity is reduced to four longitudinal channels and their branches.

A

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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B

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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C

Assertion is correct but Reason is incorrect.

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D

Assertion is incorrect but Reason is correct.

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
The assertion is correct as beneath the muscular layer of the body wall and surrounding the alimentary canal is found a botryoidal tissue. The coelomic cavity of a leech is mostly filled with botryoidal tissue formed of branching tubular cells.
The reason is also correct and a correct explanation of assertion because the coelomic cavity is reduced to four longitudinal channels and their branches due to the presence of this tissue.
Therefore, the correct answer is option A.

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