Long Answer TypeThe diagram given below is an experiment conducted to study a factor necessary for photosynthesis. Observe the diagram and answer the questions which follow. 
(i) What is the aim of the experiment?
(ii) Name the test performed on the leaf and the solution used for the test.
(iii)What type of leaf was used for the experiment? Give an example.
(iv)What is the expected result of the above test on the parts labelled A and B?
(v) Give a balanced chemical equation to represent the process of photosynthesis.(i) Draw a well-labelled diagram to show the metaphase stage of mitosis in an animal cell having four chromosomes.
(ii) State any two reasons for population explosion in India.
(iii)Give biological reasons for the following:
(1) Pituitary gland is also known as the master gland.
(2) Gametes have a haploid number of chromosomes.(i) 
(ii) Reasons for the population explosion in India:
1. Illiteracy: Most of the people in rural areas are illiterate, ignorant.
2. Traditional beliefs: Among the people from the lower strata of society, children are regarded as a gift of God and a sign of prosperity.
(iii)
1. The pituitary gland controls the secretion of all the other endocrine glands. Therefore, the pituitary gland is also known as the master gland.
2. Gametes are formed due to meiosis. Meiosis is the reduction division during which daughter cells receive half the number of chromosomes as that of the parent cells. Therefore, gametes have a haploid number of chromosomes.
Draw a neat diagram of a neuron and label the following parts:
(1) Node of Ranvier
(2) Nissl’s granules
(3) Cyton
(ii) Name the part of the human brain which is associated with the following:
(1) Seat of memory
(2) Coordinates muscular activity
(iii)Mention any three major activities of WHO.
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