Which disease is caused by high levels of sugar in the blood and urine?

The growth of tendril in pea plants is due to

$A$ protective and an insulating sheath of myelin found around the axon is made up of ..........

Which of the following statements are true about the brain?
$(i)$ The main thinking part of the brain is the hindbrain.
$(ii)$ Centres of hearing,smell,memory,sight,etc.,are located in the forebrain.
$(iii)$ Involuntary actions like salivation,vomiting,and blood pressure are controlled by the medulla in the hindbrain.
$(iv)$ Cerebellum does not control posture and balance of the body.

$(a)$ Define reflex arc. Draw a flow chart showing the sequence of events which occur during sneezing.
$(b)$ List four plant hormones. Write one function of each.

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