$(a)$ Draw a diagram of the human brain.
$(b)$ Label the Cerebrum and Cerebellum on it.
$(c)$ What is the role of the Cerebellum?

Illustrate with the help of a diagram,the effect of auxins in different parts of a plant.

Which part of the brain is responsible for the coordination of physical movements like dancing, cycling, and walking?

Which part of the plant exhibits negative phototropism?

$(a)$ An old man is advised by his doctor to take less sugar in his diet. Name the disease from which the man is suffering. Mention the hormone due to imbalance of which he is suffering from this disease. Which endocrine gland secretes this hormone?
$(b)$ Name the endocrine gland which secretes growth hormone. What will be its effect on a person of:
$(i)$ Deficiency of growth hormones?
$(ii)$ Excess secretion of growth hormones?

Give the function$(s)$ of the following plant hormones:
$(i)$ Auxins $(ii)$ Gibberellins $(iii)$ Cytokinins $(iv)$ Abscisic acid $(v)$ Ethylene