ZoologyRods and cones are the photoreceptor cells of the human retina. The A  vision is the function of rods and B vision is the function of cones. The rods contain C, which is a derivative of D. ABCD1ScotopicPhotopicVisual purpleVitamin A2PhotopicScotopicVisual purpleVitamin A3ScotopicPhotopicVisual violetVitamin D4PhotopicScotopicVisual violetVitamin D

Rods and cones are the photoreceptor cells of the human retina. The vision is the function of rods and B vision is the function of cones. The rods contain C, which is a derivative of D.

 ABCD
1ScotopicPhotopicVisual purpleVitamin A
2PhotopicScotopicVisual purpleVitamin A
3ScotopicPhotopicVisual violetVitamin D
4PhotopicScotopicVisual violetVitamin D

  1. A

    1

  2. B

    2

  3. C

    3

  4. D

    4

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    Solution:

    There are two types of photoreceptor cells, namely, rods and cones. These cells contain the light-sensitive proteins called the photopigments. The daylight (photopic) vision and colour vision are functions of cones and the twilight (scotopic) vision is the function of the rods. The rods contain a purplish-red protein called the rhodopsin or visual purple, which contains a derivative of Vitamin A.

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