Question

what helps the tiger to move in dark

Answer 1

The eye of the mammals comprise of two classic photoreceptor cells, the rods and the cones. Out of this the rods are the ones which make it possible for us to see at night.

In the eyes of a carnivore like Tiger a layer of tissue is present right behind the retina known as Tapetum lucidum. This structure reflects the visible light back through the retina thereby increasing the light availability to the photoreceptors.

This however leads to a slight blurring of image formed but increases the visibility of the said mammal. The carnivores have the Choroidal Tapetum cellulosum as the anatomical variation which is arranged as organised refractive crystals.

The Tiger also has a larger eyeball, a larger lens, a large optical aperture and more rods as the photoreceptor cells than cones. Hence a Tiger is well adapted to the night vision and is one of the reasons why it mostly hunts at night.

Fun Fact - It is believed that some tigers can see shades of dull greens, blues and reds while the rest can see black and white. This disparity is believed to exist due to variable number of cone cells in the eyes!




Hope it will help you

Answer 2

A tiger's sense of hearing is very sharp. Give reasons to support this statement.