(a) Name the following:

(i) The organization which procures and supplies blood during an emergency.

(ii) The blood vessel which supplies blood to the liver.

(iii) The number of chromosomes present in a nerve cell of a human being.

(iv) The layer of the eyeball that forms the transparent Cornea.

(v) The wax like layer on the epidermis of leaves which reduces transpiration.

Which one of the following is non-biodegradable?

1. DDT
2. Vegetable peel
3. Cardboard
4. Bark of trees

Aqueous humour is present between the:

1. Lens and Retina
2. Iris and Lens
3. Cornea and Iris
4. Cornea and Lens

A strong chemical substance which is used on objects and surfaces in our surroundings to kill germs:

1. Cresol
2. Carbolic acid
3. Iodine
4. Mercurochrome