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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.
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संबंधित प्रश्न
State the main functions of the following:
Medulla Oblongata
Mention two ways in which photosynthesis is useful to life.
Are the following statement true or false? Give a reason in support of your answer.
If you immerse a leaf intact on the plant in ice cold water, it will continue to photosynthesise in bright sunshine.
Are the following statement true or false? Give reason in support of your answer.
The starting point of carbon cycle is the release of carbon dioxide by animals during respiration.
Complete the following food chain by writing the names of appropriate organisms in the blank:
Grass → __________ → Lion
Explain the Term ATP.
Name the following:
Source of oxygen given out in photosynthesis.
Complete the following sentence with appropriate word:
A plant that does not perform photosynthesis is _______.
Write the functional activity of the following structure:
Chloroplasts
1. What happens to the dandelion flower
- During the daytime?
- At night?
2. What is the phenomenon known as?
