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प्रश्न
Photosynthesis in green plants is directly and indirectly dependent on so many plant structures.
Explain briefly the role of the following structures in this process Guard cells.
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उत्तर
Guard cells: They regulate the opening and closing of stomata and thus regulate the entry of carbon dioxide through the stomata.
संबंधित प्रश्न
Two healthy green plants were placed in the dark for 24 hours. They were then set up, as shown in the figure, for 4 hours. Then a leaf was taken from each plant and
the chlorophyll was removed from the leaves:
( i) What is the next and final step in this experiment?
( ii ) What would be the results of the final step?
( iii ) Why was it necessary to grease the glass sheet?
( iv ) What hypothesis is being tested in this experiment?
Complete the following statement by choosing the correct alternative given below :
All animals would die on the earth if there was no ______.
Mention one difference between the following on the basis of what is given in bracket.
Chlorophyll and chloroplast (part of plant cell)
All life owes its existence to chlorophyll. Give reason.
Given below is the representation of a certain phenomenon in nature. With four organisms 1-4.
Name any one organism that could be shown at No .5
A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre. The potted plant was then placed in sunlight for a few hours.
What aspect of photosynthesis was being tested?
Why Is Photosynthesis Important in Nature?
Differentiate Between:
Light reaction and Dark reaction.
Choose the Correct Answer:
The main difference between chlorophyll ‘a’ and ‘b’ is:
Give reasons/explain:
During the starch test, the leaf is boiled in methylated spirit.
