Choose the odd term out from each of the following set of terms. Mention the category to which the remaining three belong:

(a) Sulphur dioxide, Oxygen, Carbon monoxide, Nitrogen dioxide.

(b) Pons, Epidermis, Xylem, Phloem.

(c) Tympanum, Pinna, Auditory canal, Malleus.

(d) Ureter, Urethra, Uterus, Renal Pelvis.

(e) Stomata, Lenticles, Cuticle, Root hair.

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.

Explain the term Menarche.

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