Which gland secretes growth hormone? Also mention its effect on a person due to its deficiency as well as its excess secretion.

Given below is a diagram representing the structure of an ovum surrounded by a few sperm cells. Study the diagram and answer the questions that follows.

(a) Where does fertilisation, normally take place?

(b) Mention the chromosome number in egg and zygote in humans.

(c) What is the main function of corona radiata?

Define glomerular filtrate.

A red coloured pigment A is found in the blood of vertebrates and a few invertebrates. A blue coloured respiratory pigment B is found in the blood of several invertebrates. Name A and B.