Question

1)Transpiration pull will be maximum under which set of the following conditions-
a) open stomata,dry atmosphere and moist soil
b) open stomata,high humid atmosphere and well irrigated soil
c) open stomata,high humid atmosphere and dry soil
d) closed stomata,dry atmosphere and dry soil

2) The rate of transpiration is more when-
a) atmosphere is dry
b)temperature is high
c)humidity is high
d)atmosphere is dry and temperature is high

3) Transpiration is the fastest when the day is-
a)cool,humid and windy
b)hot,humid and still
c)hot,humid and windy
d)hot,dry and windy

4) Transpiration is best defined as-
a)loss of water by the plant b)evaporation of water from the aerial surfaces of a plant
c)loss of water,as water vapour,by a plant
d)release of water by a plant into the atmosphere

Answer 1

1) Transpiration pull with be maximum when :-
The stomata is open, atmosphere will be dry and the soil will be moist.
Open stomata will help in losing water, since the atmosphere is dry, more water will be released in the atmosphere.

Answer :- (a)

2) The rate of transpiration is more when
Atmosphere is dry as well as the temperature is high.
Dry atmosphere will help in releasing
more water and the high temperature increases the rate of transpiration.

Answer :- (d)

3) Transpiration is the fastest when the day is :-
hot, dry and windy.

These factors increases the rate of evaporation as well as transpiration.

Answer :- (d)

4) Transpiration is best defined as :-

Transpiration is defined as the loss of water in the form of water vapour by the aerial surfaces of plants (leaf, stem etc).

Option a doesn't says for vapour form
option c doesn't explains the parts from where the water is lost
option d again doesn't say about vapour form.

Hence the answer is :- (b)

Answer 2

Answer:

1) (a) Open stomata, dry atmosphere and moist soil.

2) (d) atmosphere is dry and temperature is high.

3) (d) hot, dry and windy.

4) (b) evaporation of water from the aerial surfaces of a plant.

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