How do the rods and cones in the eye differ?
a. rods are very sensitive to light but do not distinguish colors.
b. cones are less sensitive to light but can distinguish colors.
c. rods are less sensitive to light but can distinguish colors. cones are very sensitive to light but can't distinguish colors.
rods are very sensitive to light and can distinguish colors. cones are less sensitive to light and can't distinguish colors.

Rods and cones are photoreceptors that are located in the retina of the eye. Rods are responsible for vision at low light levels while cones are responsible for vision at higher light levels. Therefore, rods are very sensitive to light. Rods work well at night when light is low. Cones, however, are responsible for color vision and high visual spatial acuity. Therefore, rods cannot distinguish colors. With these differences, the correct answer is:
A. Rods are very sensitive to light but do not distinguish colors.