Nocturnal animals (animals which sleep during the day and come out at night) tend to have wide pupils and lot of rods in their retinas. Suggest reasons for this.

Nocturnal animals (animals which sleep during the day and come out at night) tend to have wide pupils and lot of rods in their retinas because wide pupils allow more light to enter the eye during night. The reason behind is, Rod cells in the retina are sensitive to dim light and hence help to see in properly at night.