EASY
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The symplast pathway is most easily disrupted when:

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Important Questions on Plant Water Relation

MEDIUM
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
How does ascent of sap takes place in tall trees?
MEDIUM
Which of the following is not observed during the apoplastic pathway?
HARD
How does ascent of sap occur in tall tree?
EASY
If the humidity of the atmosphere suddenly increases substantially, the water flow in the xylem will-
EASY
Root pressure is usually acidic because:
MEDIUM
Explain apoplast pathway of water in plants. Draw a diagram to show major paths of water flow in plant cells.
MEDIUM

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
EASY

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

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

Reason (R): Root endodermal cells are suberized

EASY
Most water absorption in plants takes place through
EASY
Active absorption of water by roots from soil is mainly affected by
EASY
During absorption of water by roots, the water potential of cell sap is lower than that of
EASY
In the given flow chart, the flow of water is shown from soil to xylem of the root. Identify the tissues involved in steps A and B.
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MEDIUM

Represent the union of two sets by Venn diagram for each of the following.

X={x | x is a prime number between 80 and 100}

Y={y | y is an odd number between 90 and 100}

EASY
During absorption of water by roots, the water potential of cell sap is lower than that of
MEDIUM
Refer to the given figure. Identify the labelled parts (A-H) and select the correct option.
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EASY
H+ ions of the root are exchanged with _____ (cation/anion) of the soil.
EASY
Passive absorption of water is related to all, except