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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?
विकल्प
To remove chlorophyll from the leaves.
To increase the release of CO2 by the leaves.
To remove starch from the leaves.
To stop synthesis process in the leaves.
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उत्तर
To stop synthesis process in the leaves.
APPEARS IN
संबंधित प्रश्न
Describe an experiment to prove that sunlight is necessary for photosynthesis.
The diagram alongside represents an experiment conducted to prove the importance of a factor in photosynthesis.
Study the same and then answer the questions that follow:
(i) Name the factor being studied in his experiment.
(ii) Why was the plant kept in a dark room before conducting the experiment?
(iii}Why was the experimental leaf then kept in
1. boiling water 2. methylated spirit?
(iv) Name the solution used to test for the presence of starch in the leaf.
(v) What will we observe in the experimental leaf at the end of the starch test?
(vi) Give a balanced chemical equation to represent the process of photosynthesis.
During photosynthesis, the oxygen in glucose comes from
Are the following statement true or false? Give a reason in support of your answer.
The rate of photosynthesis continues to rise as long as the intensity of light rises.
Complete the following food chain by writing the names of appropriate organisms in the blanks:
→ __________ → __________ → Hen → Man
All life on earth Would come to an end if there were no green plants.
Name the following:
The process by which plants produce their food.
Planting trees help in decreasing global warming.
Only green plants have the unique capacity to release ______ into the atmosphere.
A potted plant with variegated leafes was kept in dark for 24 hours and then placed in bright sunlight. Answer the following questions.
- Which aspect of photosynthesis is being tested in the above diagram?
- Why was the plant kept in the dark for 24 hours?
- After the starch test, what will be the colour of the yellow and green parts of the leaf? Give reasons to support your answer.
