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Question
The figure below represents the vertical section of a leaf:
(i) Name the parts labeled 1 to 5.
(ii) What do the two arrows (dotted and solid) indicate in the day time and at night?
(iii) Could you add one more arrow in the figure? If yes, what for?
(iv) How many leaf veins have been shown in this section?
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Solution
(i)
- Cuticle,
- Upper epidermis,
- Palisade tissue,
- Spongy parenchyma,
- Guard cell of a stoma.
(ii) In the day time dotted arrow shows the path of CO2 while solid arrow shows the path of oxygen. A night dotted arrow shows the path of oxygen while the solid arrow shows the path of CO2:
(iii) Yes, we can add one more arrow in the figure to show the loss of water during transpiration.
(iv) Only one leaf vein has been shown in this section.
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