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प्रश्न
Describe an experiment to prove that sunlight is necessary for photosynthesis.
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उत्तर
Experiment to prove that sunlight is necessary for photosynthesis:
a. A potted plant is kept in the dark for two days to destarch the leaves.
b. A part of a leaf is covered with a black paper by clip.
c. Now the plant is kept in the light for few hours.
d. The leaf is plucked and is boiled in water and is then decolourized with
alcohol.
e. The portion of leaf which received light turns blue with iodine because
photosynthesis took place in that part of leaf.
f. The part of leaf which was covered with black paper remains colourless
because photosynthesis could not take place in the absence of sunlight.
APPEARS IN
संबंधित प्रश्न
Formalin, Iodine, DDT, Lime
Complete the following paragraph by filling in the blank (1) to (5) with appropriate words:
To test a leaf for starch, the leaf is boiled in water to (1) _________. It is then boiled in Methylated spirit to (2) ________. The leaf is dipped in warm water to soften it. It is placed in a petri dish, and (3) _____ solution is added. The region of the leaf which contains starch, turns (4) ________and the region while does not contain starch, turns (5) __________.
How is the rate of photosynthesis affected when a green plant gets the green light?
Give technical term:
The form of energy is converted into chemical energy during photosynthesis.
Choose the correct option.
In maize and wheat, the first stable products formed in bundle sheath cells respectively are ________.
Gas exchange takes place in plants using _____.
State whether true or false. If false, correct the statement.
When the weather is hot, water evaporates lesser which is due to opening of stomata.
Where do the light-dependent reaction and the Calvin cycle occur in the chloroplast?
1. What happens to the dandelion flower
- During the daytime?
- At night?
2. What is the phenomenon known as?
