write an experiment for aerobic resporation by using flower buds or germinating seeds
Answers
Experiment to demonstrate the production of carbon dioxide in aerobic respiration:
Requirements:
Bottle, germinating seeds, cork, stopper, glass tube, water, wide-mouthed tube with a stopcock, lime water.
Method:
1. Take a wide-mouthed bottled and place some germinating seeds in it.
2. Close the mouth of the bottle with a two-holed cork.
3. Insert a glass tube, bent twice at right angles, through one of the hole of cork and through the another hole insert a wide-mouthed tube functioning as water reservoir and fitted with a stopcock.
4. Dip the another end of bent glass tube into the water in a beaker (Fig. 43).
Demonstration of production of CO2 during respiration
5. Keep the experiment as such for a few hours allowing the seeds to respire.
6. Now replace the water-filled beaker with a lime-filled beaker and open the stopcock of water reservoir to allow the water to go in the bottle containing seeds.
Observations:
After some time the air bubbles come out and the lime water becomes milky.
Results:
Lime water turns milky due to the carbon dioxide evolved during the process of germination of seeds. When water is poured by opening the stopcock of water reservoir, it drives out the air through the bent tube, and as the air passes through the lime water, the latter turns milky due to the fact that the air contains carbon dioxide.
Answer:
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