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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
Choose the correct answer:
Which one of the following is the best reason for leaving a plant in a dark place before carrying out experiments on photosynthesis?
The rate of photosynthesis is not affected by
A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.
What aspect of photosynthesis was being investigated?
What is the importance of photosynthesis in the life of the following:
Green plants
Complete the following food chain by writing the names of appropriate organisms in the blank:
Grass → __________ → Lion
Give technical term:
Which process is the ultimate source of energy for all living organisms?
Complete the following sentence with appropriate word:
A plant that does not perform photosynthesis is _______.
Answer the following question.
Explain why photosynthesis is considered the most important process in the biosphere.
Guard cells of stomata are green but cannot photosynthesize? Give reason.
Assertion (A): All food chains begin with herbivores.
Reason (R): Green plants are heterotrophs.
