Tissues — Science STD 9 — Question

Which of the following is incorrect pair?

1. Chloroplast-kitchen of the cell.
2. Mitochondria-power house of the cell.
3. Lysosome-secretory granules.
4. nucleus-brain of the cell.

What is the distribution of electrons in an oxygen atom:

Water stored in a dam possesses:

Growing different crops in the same field in a pre planned succession is:

1. Crop management.
2. Crop rotation.
3. Intercropping.
4. Plant breeding.

During respiration, glucose and oxygen enter our body cells and waste products carbon dioxide and water leave the body cells by the process of:

1. Effusion.
2. Osmosis.
3. Diffusion.
4. Plasmolysis.

What is the speed of a train which overtakes, a man walking at a speed of 5 km/ h in 30 seconds, if the train is 274 metres long?

While opening a tap with two fingers, the forces applied are :

 A goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goalkeeper to:

Complete the following sentence:
The potential energy of a body is the energy by virtue of its _______:

Salt dissolved in water can be recovered by: