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Test: Transpiration (NCERT)


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Test: Transpiration (NCERT) - Question 1

The bulliform cells of leaves lose their turgidity during excessive

Detailed Solution for Test: Transpiration (NCERT) - Question 1

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.

Test: Transpiration (NCERT) - Question 2

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

Detailed Solution for Test: Transpiration (NCERT) - Question 2

(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).

Test: Transpiration (NCERT) - Question 3

The given figure shows two states of a stomata.

In which of the conditions (i) and (ii), guard cells will have higher water content?

Detailed Solution for Test: Transpiration (NCERT) - Question 3

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).

Test: Transpiration (NCERT) - Question 4

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

Detailed Solution for Test: Transpiration (NCERT) - Question 4

Leaf having stomata equally distributed on both surfaces is called amphistomatic (isobilateral) leaf, e.g., most monocot leaves.

Test: Transpiration (NCERT) - Question 5

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

Detailed Solution for Test: Transpiration (NCERT) - Question 5

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.

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