Briefly dicuss any four activities which can be practised to overcome stress.

Suggest any four activities in daily life which are eco-friendly.

(a) State how the constant internal environment is beneficial to organisms. (b) Explain any two alternatives by which organisms can overcome stressful external conditions.

(a) State how the constant internal environment is beneficial to organisms. (b) Explain any two alternatives by which organisms can overcome stressful rxternal conditions.

Any four physical quantities that can be measured

Since the origin of life on Earth, there were five episodes of mass extinction of species . (i) How is the 'Sixth Extinction', presently in progress, different from the previous episodes ? (ii) Who is mainly responsible for the 'Sixth Extinction' ? (iii) List any four points that can help to overcome this disaster.

State any two ways by which food can be preserved.

Do you know of any activity which may be polluting this water source?

List any four abiotic factors which affect different living beings.

Write four effects which heat can produce on a body.

List any four ways in which the antibiotics are being used.