(English Medium) ICSE Class 10 - CISCE Important Questions for Biology

The diagram below represents a process in plants. The setup was placed in bright sunlight. Answer the following questions:

a) Name the physiological process depicted in the diagram.

Why was oil added to the water?

b) When placed in bright sunlight for four hours, what do you observe with regard to the initial and final weight of the plant? Give a suitable reason for your answer

c) What happens to the level of water when this setup is placed in:

1. Humid conditions?
2. Windy conditions?

d) Mention any three adaptations found in plants to overcome the process mentioned in (i).

e) Explain the term ‘Guttation’.

 Give suitable biological reasons for the following statement: 
Root hairs become flaccid and droop when excess fertilizers are added to the moist soil around them. 

Define the following:

Hypertonic solution

Distinguish between the following:

Hypotonic and Hypertonic solutions

What is the water potential?

Explain the Term:

Osmosis

Deplasmolysis occurs when a plasmolysed cell is placed in ______.

Arrange and rewrite the terms in the group in the correct order to be in a logical sequence beginning with the term that is underlined:

Xylem, Soil water, Cortical cells, Root hair.

Excessive use of fertilisers in agricultural fields reduces the yield of crops. Justify the statement.

What is Active transport?

Osmosis takes place when there is ______.

Name the following:

Unicellular outgrowths from the epidermis of roots.

Arrange and rewrite the terms in group in correct order to be in a logical sequence, beginning with the term that is underlined:

Water vapour, Soil water, Leaves, Ascent of Sap.

Mention two adaptations in roots for absorption of water from the soil.

During a practical exam, a plant cell in a particular solution was placed under a compound microscope. Students were told to observe the cell and name the tonicity of the solution and mention the process that occurred in the cell.

Explain the term Active transport.

Mention one characteristic of roots for absorbing water from the soil.

The given statement is incorrect. Rewrite the correct statement:

Fresh water fish when placed in hypertonic salt solution absorb water and burst.

Define the following term:

Imbibition

An apparatus, as shown below, was set up to investigate a physiological process in plants. The setup was kept in sunlight for two hours. Droplets of water were then seen inside the bell jar. Answer the questions that follow:

1. Name the process being studied.
2. Explain the process named above in Q.3(a)(i).
3. Why was the pot covered with a plastic sheet?
4. Suggest a suitable control for this experiment.
5. Mention two ways in which this process is beneficial to plants.
6. List three adaptations in plants to reduce the above mentioned process.