Q41
Water movement between cells is due to
Correct Answer
Option C
Solution
(c) Water moves from lower DPD to higher DPD between cells.
Transport in Plants
Q42
The closure of lid of pitcher in a pitcher plant, is due to
Correct Answer
Option C
Solution
(c) Paratonic (nasty) movement induced by insect stimulus closes the pitcher lid.
Q43
In soil, the water available for root absorption is
Correct Answer
Option B
Solution
(b) Capillary water is held in soil pores by surface tension and is available for root absorption.
Q44
Minerals absorbed by roots move to the leaf through the
Correct Answer
Option A
Solution
(a) Minerals move upward in the xylem along with the water stream.
Q45
The ability of the Venus fly trap to capture insects is due to
Correct Answer
Option D
Solution
(d) Rapid turgor pressure changes in leaf cells snap the trap shut.
Q46
The rupture and fractionation do not usually occur in the water column in vessel/tracheids during ascent of sap because of
Correct Answer
Option B
Solution
(b) Cohesion (water-water) and adhesion (water-wall) maintain the continuous water column.
Q47
Guttation is the result of
Correct Answer
Option D
Solution
(d) Root pressure drives guttation — water exudes through hydathodes.
Q48
Roots play insignificant role in absorption of water in
Correct Answer
Option A
Solution
(a) Pistia (water lettuce) is a hydrophyte; water absorption through roots is not critical.
Q49
Root pressure develops due to
Correct Answer
Option D
Solution
(d) Active absorption of mineral ions creates osmotic gradient → root pressure develops.
Q50
A column of water within xylem vessels of tall trees does not break under its weight because of
Correct Answer
Option A
Solution
(a) Water has high tensile strength due to cohesion — maintains continuous water column.
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