Transport in Plants Test

Result

Transport in Plants Test - 5

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Weekly Quiz Competition

Question 1
4 / -1

The bulliform cells of leaves lose their turgidity during excessive

A
assimilation

B
transpiration

C
photosynthesis

D
respiration

Solution

In some grasses (isobilateral leaves), on epidermis, there are some larger, thin walled cells called bulliform cells are present, which in dry condition lose water through transpiration and thus the rolling up of leaves occurs, e.g., in Poa, Agropyron, Amophilla, etc.
Question 2
4 / -1

Match column-I with column-II and select the correct option from the codes given below.

A
A−(iv), B−(i), C−(iii), D−(ii), E−(v)

B
A−(iv), B−(i), C−(ii), D−(iii), E−(v)

C
A−(iii), B−(v), C−(i), D−(ii), E−(iv)

D
A−(i), B−(ii), C−(iii), D−(iv), E−(v)

Solution

(A) Vein ending - Guttation
(B) Necessary evil - Transpiration
(C) Semi-permeable membrane - Osmosis
(D) Cohesion - Transpiration pull
(E) Stomata closure - ABA
So, the correct answer is (b).
Question 3
4 / -1

The given figure shows two states of a stomata.
In which of the conditions (i) and (ii), guard cells will have higher water content?

A
(i) only

B
(ii) only

C
Equal in both

D
No water content in both

Solution

When water supply is adequate, guard cells become turgid, their thin walls get extended and thick walls become slightly concave so that the stomatal aperture opens as shown in figure, condition (i).
Question 4
4 / -1

Amphistomatic leaf, with stomata distributed equally on both the surfaces, is an example of

A
isobilateral leaf

B
dorsiventral leaf

C
xerophytic leaf

D
hydrophytic leaf

Solution

Leaf having stomata equally distributed on both surfaces is called amphistomatic (isobilateral) leaf, e.g., most monocot leaves.
Question 5
4 / -1

Loss of water in the form of vapours from the living tissues of aerial plant parts is called

A
transpiration

B
guttation

C
bleeding

D
precipitation

Solution

The loss of water in the vapour form from the exposed parts of a plant is called transpiration the loss of water due to transpiration is quite high. It is 2 litres per day in sunflower 36 − 45 litres in apple and upto 1 tonne per day in elm tree.