Biology
The figures (A) and (B) given below are showing some kind of adjustment. Study the figures and answer the questions that follow.
(a) Identify the kinds of adjustments done in the figure (A) and (B).
(b) Distinguish between the adjustments of figures (A) and (B) on the basis of :
(i) The size of pupil.
(ii) The pigment which gets regenerated.
(iii) Cells of the retina.
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Answer
(a) Kinds of adjustments done in the figure:
(A) → dilated pupil due to dim light.
(B) → Constricted pupil due to bright light.
(b)
| S. No. | Factor | A | B |
|---|---|---|---|
| (i) | The size of pupil | bigger | smaller |
| (ii) | The pigment which gets regenerated | Rhodopsin (visual purple) | Iodopsin. |
| (iii) | Cells of the retina | Rods become active and cones become inactive | Cones become active and rods become inactive |
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