Question

With the help of diagram explain how exchange of gases occurs in a leaf of plant.

Answer 1

Answer:

stage 1:carbon dioxide and water enters the leaf through the stomata present in the epidermis of the leaf and enter the pallisade parenchyma containing chloroplast.also the sunlight is absorbed.

stage 2:co2 and water enters the chloroplast where h20 is broken down to 2H+ + 1/2o2 + 2e-

the o2 is released out of the stomata

stage 3:the hydrogen atom reacts with co2 to form glucose which is the energy required.

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Answer 2

Answer:

• Gaseous exchange in stomata takes place through the kidney shaped gaurd cells called stomata.

• The opening and closing of the stomatal pore is carried out by the gaurd cells.

• They open themselves if there is excess of CO2 conc. into the cell.

• Subsequently, they close again when CO2 conc. begin to reduce.

• This process converts atmospheric CO2 to O2.

Explanation:

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