In an experiment, four freshly plucked leaves (A-D) of a plant, such as those of China Rose, was treated as follows:(A) coated with Vaseline on its upper surface(B) coated on the lower surface

Home » In an experiment, four freshly plucked leaves (A-D) of a plant, such as those of China Rose, was treated as follows:(A) coated with Vaseline on its upper surface(B) coated on the lower surface

In an experiment, four freshly plucked leaves (A-D) of a plant, such as those of China Rose, was treated as follows:
(A) coated with Vaseline on its upper surface
(B) coated on the lower surface

Biology | Class 10 | ICSE | Selina | Transpiration

In an experiment, four freshly plucked leaves (A-D) of a plant, such as those of China Rose, was 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 and D were left in a room for about 24 hours.
1. Which leaf would become most limp? Why?

2. Which leaf would show least limping? Why?

Answer:

1. Leaf D is very limp. Because this is the only leaf that is left untouched and water can be lost by switching up and down.

2. Leaf C shows a slight limping. Because both parts of the leaf are covered with Vaseline. Therefore, no water is lost from this leaf through transpiration.

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