In an experiment, four freshly plucked leaves (A - D) of a plant, such as those of China-Rose, were treated as follows :
(A) coated with Vaseline on its upper surface.
(B) coated on the lower surface
(C) coated on both surfaces
(D) left uncoated
All the four leaves A, B, C & D were left in a room for about $24$ hours.
Which leaf would show least limping? Why?

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Solution

The leaf C shows least limping. Because both surfaces of the leaf are coated with Vaseline. Hence, no water is lost from the leaf through the transpiration.

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Similar questions

Q. In an experiment, four freshly plucked leaves (A - D) of a plant, such as those of China-Rose, were treated as follows :
(A) coated with Vaseline on its upper surface.
(B) coated on the lower surface
(C) coated on both surfaces
(D) left uncoated
All the four leaves A, B, C & D were left in a room for about

24

hours.
Which leaf would become most limp? Why?

In an experiment, four freshly plucked leaves (A - D) of a plant, such as those of China-Rose, were treated as follows :

(A) coated with vaseline on its upper surface.

(B) coated on the lower surface.

(D) left uncoated.

All the four leaves A, B, C and D were left in a room for about 24 hours.

(i) Which leaf would become most limp ? Why ?

(ii) Which leaf would show least limping ? Why ?

The diagram below shows an experiment in which: [3 MARKS]
(a) Leaf A was coated with grease on both surfaces.
(b) Leaf B was coated with grease on the lower surface.
(c) Leaf C was coated with grease on the upper surface.
(d) Leaf D was left without any application of grease.

Answer the following:
(i) Which leaf dries first?
(ii) Which leaf dries last?
(iii) Which leaf does not show any change?

Q. Leaves of a healthy potted plant were coated with vaseline; will this plant remain healthy for long?

Leaves of a healthy potted plants were coated with Vaseline. Select the correct options.

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