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प्रश्न
The figure given 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 daytime 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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उत्तर
(i) 1 - Upper Epidermis; 2 - Palisade layer / chloroplast; 3 - Xylem; 4 - Phloem; 5 - Guard cell
(ii) The two arrows show the release of oxygen and water vapours during the daytime and carbon dioxide and very less amount of oxygen is released during the night.
(iii) Yes, one more arrow can be added to show the absorption of carbon dioxide by the leaf.
(iv) One vein has been shown in this section.
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संबंधित प्रश्न
The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow : 
Name the factor studied in this experiment.
Match the terms of column I with those in column II:
| Column I | Column II |
| (i) Stomata closed | (a) decomposers |
| (ii) Autotrophs | (b) light reaction |
| (iii) By-products of photosynthesis | (c) animals |
| (iv) Photolysis | (d) during night |
| (v) Bacteria and fungi | (e) green plants |
| ( f) oxygen |
The number of water molecules required in the chemical reactions to produce one molecule of glucose during photosynthesis is
Mention one difference between the following on the basis of what is given in bracket.
Grass and grasshopper (mode of nutrition)
Complete the following sentence with appropriate word:
A dark reaction is a __________ reaction.
Choose the correct option.
In presence of high concentration of oxygen, RuBP carboxylase converts RuBP to ______.
Planting trees help in decreasing global warming.
Sunflowers open the petals in bright light during the daytime but close the petals in dark at night. This response of sunflowers is called ______.
Draw the structure of the stomata and label the parts.
