Researchers who have studied color blindness and color deficiency have found that:
A) total color blindness is extremely rare in animal species.
B) total color blindness in humans usually occurs when cones of the retina are absent or malfunctional.
C) blue-yellow color blindness is the most common form of color deficiency.
D) color deficiency is more frequently found in women than in men.

Question

Quizplus · Accepted Answer

Research has shown that total color blindness in humans is usually caused by dysfunctional or absent cones in the retina.

Researchers Who Have Studied Color Blindness and Color Deficiency Have