If the growth of a plant is towards the stimulus, what is it called?

Sunflowers orient themselves towards the direction of sunlight. What type of tropism is this?

Write the main functions of the following :
$(a)$ Sensory neuron
$(b)$ Cranium
$(c)$ Vertebral column
$(d)$ Motor neuron

Dramatic changes of body features associated with puberty are mainly because of the secretion of:

Label the endocrine glands in the figure.

Answer the following:
$(i)$ Name the endocrine gland associated with the brain.
$(ii)$ Which gland secretes digestive enzymes as well as hormones?
$(iii)$ Name the endocrine gland associated with the kidneys.
$(iv)$ Which endocrine gland is present in males but not in females?
$(v)$ Which hormone is responsible for changes in females during puberty?
$(vi)$ Iodine is necessary for the synthesis of which hormone?