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.

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 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 ?

Q. Arun carried out the following experiment with a croton (variegated) leaf. He drew the leaf in his notebook marking the green and the non-green area. He put the leaf in hot alcohol till all the green colour came out and the leaf turned white. He then washed the leaf in water and covered the leaf in iodine solution.
(a) Why did he draw the leaf and mark the green and non-green areas?
(b) What was the colour change in iodine solution?
(c) Which portions of the leaf show colour change?
(d) what can you conclude from this experiment?

Q. Which of the following components was common to both variegated leaf experiment and Mohl’s half leaf experiment?

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 show least limping? Why?

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?