With the help of a diagram trace the events occurring when you step on a sharp object. Name this art.

What is the advantage of chemotropism in plants?

Name the plant growth hormone which is synthesised at the shoot tip. Explain the fact that, shoot of a plant bends towards the light during its growth. Why?

Name the parts of brain which control the following activities: (i) Riding bicycle (ii) Centre associated with hunger (iii) Swallowing (iv) Visual analysis.

What are hormones? Name the hormone secreted by thyroid and state its function.