Question

An animal having more cones will be

• A. more active during night.
• B. more active during day
• C. able to see more colours
• D. both b and c

Answer 1

The correct option is D both b and c

Cones and rods are two types of photoreceptor cells present in the retina. Cones are responsible for the daylight or photopic and colour vision. Cones are of three types, each of which have their own photopigments that respond to red, green and blue lights. Perceptions of different colours are produced by different combinations of these cones and their photopigments. These photopigments have an important role in vision. When they absorb light they undergo chemical changes. The rod photoreceptor cells are responsible for scotopic vision or night vision. Hence animals having more rods will be more active during the night. Animals that have more cones can see far more colors than we do, example bees and butterflies.