The contraction of pupil of the eye in the presence of bright light is an example of:

Presence of tail in a child is an example of :

What job does the pupil of the eye do ?

Animals exposed to bright light have

The size of the pupil of the eye is adjusted by :

Explain the type of action involved in the contraction of pupil when the eyes are exposed to the bright light.

Which part of human eye is most sensitive to bright light?

Refraction of light in the eye occurs at :

Which of the following are cerebral reflexes? (i) a person pulls away his hand on touching a hot object (ii) a person spits out immediately when a fly enters his mouth while talking (iii) A person walking bare foot lifts his foot at once on stepping on to a nail (iv) A person's pupil contracts at once in the presence of bright light

Bright colour of petals is due to the presence of