A) only cones are involved
B) only rods are involved
C) both rods and cones are involved
D) neither rods nor cones are involved
Correct Answer: B
Solution :
Rods are longer, slender and cylindrical cells and perceive variation in intensities of light and dark in dim light condition. Cons are shorter, thicker and somewhat club shaped and perceive objects and various colours in bright light. The layer of rods and cones consists of the highly specialised neurosensory cells, which are the actual light sensitive cell.
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