Rajeev, a 10 year old boy, went to an Ophthalmologist to get his eyes tested. He noticed a poster in the clinic with questions related to the parts of human eye. Help Rajeev answer the questions:

(a) Which is the fluid that lubricates the eye?

(b) Which cells help in colour vision?

(c) Which nerve sends impulses from the eyeball to the brain?

(d) Name the structure that gives colour to the eyes.

(e) Name the part that allows entry of light rays into the eye.

Study the diagram given below and match the structure with its function:

In what form is water lost during transpiration and guttation from plants?

Ayush was in the final round of a carrom match. He was focussing intently on the strokes of the opponent player.

(a) Which part of the brain helps Ayush to focus on the game?

(b) Name the part of the brain that co-ordinates his muscles while using the striker.