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Rod cells is a type of light sensitive receptor cell present in the retinas of vertebrates. Rod contains the pigment rhodopsin and are essential for vision in dim light. Cone cells is a type of light sensitive receptor cell, found in retinas of all diurnal vertebrates. Cones are specialized to transmit information about colour and are responsible for the visual acuity of the eye. They function best in bright light.

1. Rod cells are responsible for vision in bright light.
2. Cone cells are responsible for vision in dim light.
3. Rod cells are responsible for vision in dim light.
4. Cone cells are responsible for vision in bright light.

Correct answer: Rod cells are responsible for vision in dim light.

Solution

Rod cells contain rhodopsin and are adapted for dim-light vision, so they are the cells used when light is scarce. Cone cells work best in bright light and are mainly for color and visual acuity.

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