Which plant organ shows negative phototropism?

Which of the following statements about the transmission of a nerve impulse is incorrect?

Which gland produces the hormone thyroxine?

Give the scientific names of the following regions of the human brain:
$(i)$ Region for sight.
$(ii)$ Region which controls salivation.

$(a)$ 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?

$(a)$ Name one organ each where growth hormone is synthesized in man and plant.
$(b)$ List the sequence of events that occur when a plant is exposed to unidirectional light,leading to bending of a growing shoot. Also,name the hormone and the type of movement.