In a food chain comprising frogs, insects, birds and grass, which one of the organisms is likely to have maximum concentration of harmful non-biodegradable chemicals in the body.

Maintenance of Posture and Equilibrium. Cerebellum. (a) Distinguish between voluntary and involuntary actions of our body. (b) Choose involuntary actions, amongst the following: Reading, Beating of heart, Salivation in the mouth on viewing tasty food, Talking.

Updated 1/12/2026

What is ozone? How does it protect the organisms on the earth?

Updated 1/12/2026

What are nastic and curvature movements? Give one example of each.

Updated 1/12/2026

What is reflex action? Explain the mechanism of reflex action with a suitable example.

Updated 1/12/2026

Name any two abiotic components of an environment.

Updated 1/12/2026