Identify the correct match of the type of water given in column-I and its character in column-II and select the correct option. Column-I Column-II (i) Capillary water (a) present in the form of hydrated oxides of silicon and aluminium. (ii) Hygroscopic water (b) goes down through large pores between soil particles and reaches the water table. (iii) Combined water (c) held in between small non-colloidal soil particles. (iv) Gravitational water (d) held tightly around soil particles by adhesive forces.

(i)-(c), (ii)-(d), (iii)-(a), (iv)-(b)

(i)-(c), (ii)-(d), (iii)-(b), (iv)-(a)

(i)-(c), (ii)-(a), (iii)-(b), (iv)-(d)

(i)-(c), (ii)-(b), (iii)-(d), (iv)-(a)

Rate of transpiration is higher than absorption

Rate of absorption is higher than transpiration

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The water lost during transpiration _____.

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Important Questions on Plant Water Relation

EASY

Biology>Physiology>Plant Water Relation>Transpiration

Which one gives the most valid and recent explanation for stomatal movements?

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Biology>Physiology>Plant Water Relation>Transpiration

Transpiration and root pressure cause water to rise in plants by:

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Biology>Physiology>Plant Water Relation>Transpiration

Stomata in grass leaf are

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Biology>Physiology>Plant Water Relation>Transpiration

Study the diagram and the list given below.

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i) Chloroplast

ii) Epidermal cell

iii) Guard cell

iv) Subsidiary cell

v) Stomatal pore

The correct match is

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Biology>Physiology>Plant Water Relation>Transpiration

"Transpiration is a necessary evil". Explain.

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Biology>Physiology>Plant Water Relation>Transpiration

Three uniformly watered plants i, ii and iii were kept in 45% relative humidity, 45% relative humidity with blowing wind and 95% relative humidity, respectively. Arrange these plants in the order (faster to slowest) in which they will dry up.

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Biology>Physiology>Plant Water Relation>Transpiration

Stomatal movement is not affected by

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Biology>Physiology>Plant Water Relation>Transpiration

Which of the following facilitates opening of stomatal aperture?

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Biology>Physiology>Plant Water Relation>Transpiration

Explain Transpiration pull theory.

HARD

Biology>Physiology>Plant Water Relation>Transpiration

"Transpiration is a necessary evil". Discuss.

EASY

Biology>Physiology>Plant Water Relation>Transpiration

Identify the correct match of the type of water given in column-I and its character in column-II and select the correct option.

Column-I		Column-II
(i)	Capillary water	(a)	present in the form of hydrated oxides of silicon and aluminium.
(ii)	Hygroscopic water	(b)	goes down through large pores between soil particles and reaches the water table.
(iii)	Combined water	(c)	held in between small non-colloidal soil particles.
(iv)	Gravitational water	(d)	held tightly around soil particles by adhesive forces.

EASY

Biology>Physiology>Plant Water Relation>Transpiration

Given below is a diagram of the stomatal apparatus. Match the labels with the corresponding names of the compounds.

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Choose the correct combination.

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Biology>Physiology>Plant Water Relation>Transpiration

If the humidity of the atmosphere suddenly increases substantially, the water flow in the xylem will-

HARD

Biology>Physiology>Plant Water Relation>Transpiration

Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening, carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of the following options:

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Biology>Physiology>Plant Water Relation>Transpiration

Take two plants, keep plant