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Question
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.
Is there any control in this experiment? If so, state it.
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Solution
Yes. The other uncovered leave of the potted plant act as a control.
RELATED QUESTIONS
The figure given below represents an experimental setup with a weighing machine to demonstrate a particular process in plants. The experimental setup was placed in bright sunlight. Study the diagram and answer the following questions:
(i) Name the process intended for study.
(ii) Define the above mentioned process.
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(iv) What is the purpose of keeping the test tube B in the experimental setup?
The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow :
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Green plants
Choose the correct option.
For fixing one molecule of CO2 in Calvin cycle _______ are required.
What will happen if we remove the fish from the aquarium and keep it (with green plants) in a dark place?
To which directional stimuli do
- roots respond
- shoots respond?
What are primary producers?
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Define the following term:
Photolysis of water
