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Question
Write an experiment to show that oxygen is needed for germination.
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Solution
Experiment to show that oxygen is needed for germination:
- Take two conical flasks A and B.
- Spread wet cotton wool in each flask and place some soaked seeds on it.
- Hang a test tube containing alkaline pyrogallic acid by means of a thread in flask A.
- In flask B, hang a test tube containing water.
- Cover the mouths of the test tubes with cork.
- Provide light and temperature for both the flasks.
- After a day or two, the seeds in flask B germinate while the seeds in flask A do not germinate as alkaline pyrogallic acid absorbs oxygen.
- This shows that oxygen is required for germination to take place.
- Take two conical flasks A and B.
- Spread wet cotton wool in each flask and place some soaked seeds on it.
- Hang a test tube containing alkaline pyrogallic acid by means of a thread in flask A.
- In flask B, hang a test tube containing water.
- Cover the mouths of the test tubes with cork.
- Provide light and temperature for both the flasks.
- After a day or two, the seeds in flask B germinate while the seeds in flask A do not germinate as alkaline pyrogallic acid absorbs oxygen.
- This shows that oxygen is required for germination to take place.
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