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A human with normal vision would be classified as a(n):

A. excellent trichromat
B. robust dichromat
C. feeble dichromat
D. feeble trichromat

Answer :

Final answer:

A person with normal vision is classified as an excellent trichromat, meaning they possess all three types of cone cells, each sensitive to a distinct color (red, green, blue), allowing the perception of the full color spectrum. Option A is correct.

Explanation:

A human with normal vision would be classified as an excellent trichromat. This classification is rooted in the nature of human color vision, which is based on the trichromatic theory. According to this theory, there are three types of cone cells in the human eye, each sensitive to a specific color: red, green, or blue. Each cone type is maximally sensitive to a slightly different wavelength of light. Hence, a trichromat is a person who possesses all three types of cones, which enables them to perceive the full spectrum of colors. A normal-sighted individual doesn't suffer from color deficiencies, hence they are an excellent trichromat.

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