Tissues — Science STD 9 — Question

What is Brownian motion? Draw a diagram to show the movement of a particle (like a pollen grain) during Brownian motion.

Give the functions of skeletal connective tissues.

You have been given a suspension and a solution. How could you tell the difference between them by their appearance?

What are three main functional regions of the cell?

Give the evidence for the existence of nucleus in an atom.

Identify the animal tissues from the given descriptions:
Tissue 'A’- cells are filled with fat globules and the tissue acts as an insulator.
Tissue 'B'- has cylindrical branched cells and the tissue shows rhythmic contraction and relaxation thought life.

A circular track has a circumference of 3140m with AB as one of its diameter. A scooterist moves from A to B along the circular path with a uniform speed of 10m/s. Find:

1. Distance covered by the scooterist.
2. Displacement of the scooterist.
3. Time taken by the scooterist in reaching from A to B.

Name an Indian and a foreign breed of poultry.

Which of the following will show Tyndall effect? Why?

1. Salt solution.
2. Starch solution.
3. Milk.
4. Copper sulphate solution.

Differential between voluntanry and involuntary muscls. Given one example of type.