Assertion :The peristome is a fringe of teeth-like projections found at the mouth of the capsule Reason: It may be of two types nematodontous and orthodontia.

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

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

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
The peristome teeth are present at the mouth of the capsule. The teeth may be solid cellular tissue or composed only of the thickened portions of the cell walls of adjacent cells. When the teeth of peristome are solid structures
composed of bundles of dead cells, it is termed nematodontous peristome are solid structures composed of bundles of dead cells, it is termed nematodontous peristome. It is found in polytrichum, Pogonatum and Tetraphis. If peristome composed of thin, membranous, transversely barred teeth, each tooth is made up of the thickened portions of the cell walls of adjacent cells. Such a peristome is called orthodontics.

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