Improvement in Food Resources — Science STD 9 — Question

Which organelle is the “power plant” of eukaryotic cell. Write in brief its functions.

State whether the following objects possess kinetic energy, potential energy, or both:

1. A man climbing a hill.
2. A flying aeroplane.
3. A bird running on the ground.
4. A ceiling fan in the off position.
5. A stretched spring lying on the ground.

Whether ATP molecules are consumed in the process of osmosis?

A cricket ball is seen to hit the bat first and the sound of hitting is heard a little later. Why?

1. Average speed
2. Uniform speed?