1.

The eyes of the nocturnal birds like owl are having a large cornea and a large pupil. How does it help them?

Answer»
  • The large pupil opens wider and allows the maximum amount of light to enter the eye in the dark. Their lens is large and situated near the retina. 
  • This also allows a lot of light to register on the retina. The retina contains 2 types of light-sensing cells rods and cones.
  • Cones are responsible for the coloured vision and require bright, focused light. 
  • Rods are extremely sensitive to light and have a photosensitive pigment called rhodopsin which plays a vital role in night vision.


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