The Fundamental Unit of Life — Science STD 9 — Question

Which type of tissue forms the inner lining of a blood vessel?

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

Percolation tanks and wells are used for:

1. Irrigation.
2. Harvesting of flood water.
3. Supply of drinking water.
4. All the above.

Most of the cells are ________ in size and are not visible to the unaided eye.

1A⁰ is:

One of the following substances is neither a good conductor of electricity nor an insulator. This substance is:

1. Chromium.
2. Gernmanium.
3. Gallium.
4. Potassium.

The law of constant proportions was given by:

The idea ‘omins cellula e cellula’ which means that all living cells arise from preecisting cells was given by:

1. Robery Brown
2. Purkinje
3. Rudolf Virchow
4. Schleiden

Lysosomes were discovered by:

Heat generating cells of animals are:

Soil erosion is caused due to:

1. Strong wind.
2. Heavy rains.
3. Keeping the fields fallow for a long.
4. All of these.