Atoms and Molecules — Science STD 9 — Question

Howis a bacterial cell different from an onion peel cell?

Tissue found in area of regular wear and tear is:

Matrix of connective tissue is produced by:

1. Plasma cells
2. Mast cell
3. Fibroblasts
4. Both (b) and (c)

Presence of tissues in a multicellular organisms ensures:

Chlorophyll is present in:

Which of the labeled parts of the cell is its controlling centre:

The acceleration produced by a force of 5N acting on a mass of 20kg in m/s² is:

1. 4
2. 100
3. 0.25
4. 2.5

'When a hanging carpet is beaten with a stick, the dust particles start coming out of it'. This phenomenon can be best explained by making use of:

1. Newton's third law of motion.
2. Newton's law of gravitation.
3. Newton's first law of motion.
4. Newton's second law of motion.

A car is accelerated on a levelled road and acquires a velocity 4 times of its initial velocity. During this process, the potential energy of the car:

1. Does not change.
2. Becomes twice that of initial potential energy.
3. Becomes 4 times that of initial potential energy.
4. Becomes 16 times that of initial potential energy.

Tissue is formed by the combination of  _____?