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Byju's Answer

Standard IX

Biology

Aves

Assertion :Ac...

Question

Assertion :Accomodation in the bird's eye is controlled by the ciliary apparatus pecten. Reason: Accomodation involves focussing light rays on.

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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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 comb-like structure of blood vessels present in the choroid of birds eye is known as pecten. The pecten helps birds to maintain a sharp image by reducing the number of blood vessels coming in the front area of the eye. It helps to focus on retina making the field of the image larger. It also nourishes the retina and helps to maintain the pH in the vitreous jelly.
Thus, the correct answer is option A.

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