Analytical questions on respiration in plants — task. Biology CBSE Live product, Class 7 (2025-26).

Answer the following and justify your answer:

The experiment is complete, and the lime water connected to the moong beans has turned milky, but the control test tube open to the room air remains clear.

i. What specific gas released by the seeds caused the lime water to turn milky?

ii. Why is the control test tube (open to the air) essential to be certain that the gas came from the seeds and not just the surrounding room air?

To show that the carbon dioxide detected came only the room air
To show oxygen detected came only from the seeds and not the room air
To show that the carbon dioxide detected came not only from the seeds, also the room air
To show that the carbon dioxide detected came only from the seeds and not the room air

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11. Analytical questions on respiration in plants

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