Tissues — Science STD 9 — Question

Wind causes weathering of rocks through:

1. Chemical change.
2. Abrasion.
3. Mechanical force.
4. Frost action.

Lysosomes are also called:

1. Suicide bags.
2. Digestive bags.
3. Demolition squads.
4. All the above.

Motion of a football after kicking is an example of:

You are given a mixture of iodine in alcohol called tincture iodine. Which method will you use to recover both, iodine as well as alcohol, from this mixture?

1. Evaporation.
2. Simple distillation.
3. Fractional distillation.
4. Crystallization.

Algae are characterized by:

1. Pyrenoids.
2. Aquatic habit.
3. Unicellular sex organ.
4. All of the above.

The force of attraction among the constituent particles is ________ in solids, ________ in liquids and __________ in gases.

'All matter is composed of very small particles called Parmanu' was first suggested by:

Which of the following is a mismatch?

1. Leprosy- bacterial infection.
2. AIDS- bacterial infection.
3. Malaria- protozoan infection.
4. Elephantiasis- nematode infection.

Phylogeny is study of:

1. Development of an indicidual.
2. Evolution of species.
3. Embryonic development of an organ.
4. Ecological adaptation of an organisms.

The covering tissue of external and internal surfaces of animals is:

1. Connective
2. Muscular
3. Nervous
4. Epithelial