A plant in the laboratory is given an increased dose of a hormone, which promotes the development of seedless fruits. Identify the hormone and write its other two functions.

What are receptors with reference to the nervous system? List three types of receptors and mention their functions. How do receptors pass the information to the brain?

Following are the two examples of plant movement.

(i) Which stimulus is common for movement in both the cases?

(ii) Does the movement take place towards the point where the stimulus is received? Mention separately for both plants.

(iii) Give one reason for the movement is each case.

A boy runs on seeing a stray dog. His breathing rate becomes very fast and blood pressure also increases.

(i) Name the hormone found to be high in his blood and the gland which produces it.

(ii) What other effects are caused by this hormone?

Adrenal glands are located on top of each kidney. What will happen if these glands do not secrete adrenaline?