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

Show by a series of diagrams, the change which a plant cell will undergo when placed in 

Hypotonic salt solution 

With decrease in atmospheric pressure, the rate of transpiration will

The rate of transpiration is more when

One of the internal factors which affect the rate of transpiration is

The loss of water as water vapour from the acrial parts of a plant is known as

Transpiration will be fastest when the day is

Most of the transpiration in tall trees occurs through

Transpiration is best defined as

(a) State whether the following statement are True (T) or False (F)

(b) Rewrite the false statement in (a) above in the correct form by changing either the first or the last word only.

Wind velocity has an effect on transpiration.

Give suitable explanation for the following: 

A higher rate of transpiration is recorded on a windy day rather than on a calm day. 

Give suitable explanation for the following: 

Excessive transpiration results in the wilting of the leaves. 

Give suitable explanation for the following: 

Water transpired is the water absorbed. 

Give suitable explanation for the following: 

More transpiration occurs from the lower surface of a dorsiventral leaf. 

What is wilting? Some plants show wilting of their leaves at noon even when the soil is well watered, Why is it so? 

List any three major factors that accelerate the rate of transpiration. 

There is a general belief that forests tend to bring more frequent rains. Can you explain it scientifically? 

List the four advantages of transpiration to the plants. 

Mention any three methods by which the plants tend to reduce transpiration. 

In an experiment, four freshly plucked leaves (A-D) of a plant, such as those of china – rose, were treated as follows:
(a) Coated with Vaseline on its upper surface.
(b) coated on the lower surface.
(c) coated on both surface
(d) left uncoated.
All the four leaves A, B, C & D were left in a room for about 24 hours.
(i) which leaf would become most limp? Why?
(ii) which leaf would show least limping? Why?

 Choose the correct answer from the four options given below : 
Which one of the following does not affect the rate of transpiration ?