Question

The diagram given below represents the vertical section of a leaf: [5 MARKS]



(a) Name the parts labeled 1 to 5.
(b) What do the two arrows (dotted and solid) indicate during the day and at night?
(c) Could you add one more arrow in the figure? If yes, what for?
(d) How many leaf veins have been shown in this section?

Answer 1

a) 2.5 Marks
b) 1.5 Marks
c) 0.5 Mark
d) 0.5 Mark

(a)
1. Cuticle
2. Upper epidermis
3. Palisade tissue
4. Spongy parenchyma
5. Guard cell of stoma

(b) In the daytime, the dotted arrow shows the path of carbon dioxide while solid arrow shows the path of oxygen.
At night, the dotted arrow shows the path of oxygen while the solid arrow shows the path of carbon dioxide.

(c) Yes, we can add one more arrow in the figure to show loss of water during transpiration.

(d) Only one leaf vein has been shown in this section.