(English Medium) ICSE Class 10 - CISCE Question Bank Solutions for Biology

Define the Cohesive and Adhesive forces.

Give at least three uses of water to green plants

What is the significance of diffusion?

What is the water potential?

Give Reasons for the following.
It is necessary to maintain a normal osmotic concentration of the blood.

Give Reasons for the following.
Salt and sugar are used in preserving food.

Give Reasons for the following.
On sprinkling common salt on grass growing in a lawn, the grass is killed.

Give Reasons for the following.
The raisins swell up in the water.

Give Reasons for the following.
We gargle with saline water in case of throat infection.

Give Reasons for the following.
Freshwater fish cannot survive in seawater.

Give Reasons for the following.
Drops of water on a leaf of plant like peepal does not enter the leaf by osmosis?

Give Reasons for the following.
 Plants growing in fertilized soil are often found to wilt if the soil is not adequately watered. Why?

Give Reasons for the following.
Plants begin to die when the excess of soluble fertilizers are added to the soil?

Differentiate between:
Osmosis and Diffusion

Differentiate between the following
Endosmosis and Exosmosis

In the figure below ‘A’ shows a cell in the normal state and ‘B’ shows the same cell after leaving it in a certain solution for a few minutes.

(i) Describe the change which has occurred in the cell as seen in B.
(ii) Give the technical term for the condition of the cell as reached in B and as it was in A.
(iii) Define the process which led to this condition.
(iv) What was the solution-isotonic, hypotonic or hypertonic, in which the cell was kept?
(v) How can the cell in B, be brought back to its original condition?
(vi) Name the parts numbered 1 to 3.

Give a diagrammatic representation of plasmolysis in a cell.

The diagram given below is of an experiment just at the start. Study the diagram carefully and answer the following questions :

(i) What does the experiment demonstrate?
(ii) Define, the process demonstrated in the experiment.
(iii) What changes are observed after a few hours?
(iv) Give two examples of a semi-permeable membrane.
(v) Which limb of the U-tube contains a more concentrated sucrose solution, A or B?
(vi) Why is the membrane separating the two solutions labeled as semi-permeable membrane?

A plant cell kept in a drop of water was examined under the low power magnification of a microscope, as shown:

(i) What would you do to bring this cell back to its original condition?
(ii) What scientific term is used for such condition?
(iii) Draw the same cell if it is kept in a strong sugar solution.

The apparatus arranged here signifies an important process.

(i) Name the process.
(ii) Where does this process occur in plants?
(iii) What solution is placed inside the dialysis tubing?
(iv) What happens to the level of the solution in the capillary tube?
(v) Define the process mentioned in Q. (i) above.