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)

Match List - I with List - II. List-I List-II (a) Cohesion (i) More attraction in liquid phase (b) Adhesion (ii) Mutual attraction among water molecules (c) Surface tension (iii) Water loss in liquid phase (d) Guttation (iv) Attraction towards polar surfaces

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

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

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

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

Water, mineral salts, some organic nitrogen and hormones

Water, mineral salts and some organic nitrogen only

EASY

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Transpiration is the main driver for the movement of water in the xylem.

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Important Questions on Plant Biology (AHL)

MEDIUM

Biology>Physiology>Plant Biology (AHL)>Transport in the Xylem of Plants

Explain apoplast pathway of water in plants. Draw a diagram to show major paths of water flow in plant cells.

EASY

Biology>Physiology>Plant Biology (AHL)>Transport in the Xylem of Plants

A column of water within xylem vessels of tall trees does not break under its weight because of:

HARD

Biology>Physiology>Plant Biology (AHL)>Transport in the Xylem of Plants

How does ascent of sap takes place in tall trees?

MEDIUM

Biology>Physiology>Plant Biology (AHL)>Transport in the Xylem of Plants

Which of the following is not observed during the apoplastic pathway?

EASY

Biology>Physiology>Plant Biology (AHL)>Transport in the Xylem of Plants

Root pressure is usually acidic because:

MEDIUM

Biology>Physiology>Plant Biology (AHL)>Transport in the Xylem of Plants

Match List I with List II:

List I	List II
A. Cohesion	I. More attraction in liquid phase
B. Adhesion	II. Mutual attraction among water molecules
C. Surface tension	III. Water loss in liquid phase
D. Guttation	IV. Attraction towards polar surfaces

Choose the correct answer from the options given below:

HARD

Biology>Physiology>Plant Biology (AHL)>Transport in the Xylem of Plants

How does ascent of sap occur in tall tree?

EASY

Biology>Physiology>Plant Biology (AHL)>Transport in the Xylem of Plants

Assertion (A): In the apoplast pathway, water movement is ultimately symplastic in the endodermis

Reason (R): Root endodermal cells are suberized

EASY

Biology>Physiology>Plant Biology (AHL)>Transport in the Xylem of Plants

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

EASY

Biology>Physiology>Plant Biology (AHL)>Transport in the Xylem of Plants

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.

MEDIUM

Biology>Physiology>Plant Biology (AHL)>Transport in the Xylem of Plants

Match List - I with List - II.

List-I		List-II
(a)	Cohesion	(i)	More attraction in liquid phase
(b)	Adhesion	(ii)	Mutual attraction among water molecules
(c)	Surface tension	(iii)	Water loss in liquid phase
(d)	Guttation	(iv)	Attraction towards polar surfaces