A) rhodopsin pigment in rod cells
B) iodopsin pigment in cone cells
C) iodopsin pigment in rod cells
D) rhodopsin pigment in cone cells
Correct Answer: B
Solution :
According to the trichromatic theory of colour vision, our perception of a multitude of colours is made possible by different stimulation of only three types of cone cells, each containing a coloured pigment, iodopsin. Examples of animals with colour vision include primates, many fishes and most birds, insects.
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