Asked by mike
In the dark (Tube 4), why does the liquid turn yellow?
Responses
The plant is performing photosynthesis
The plant is performing photosynthesis
The plant is dying
The plant is dying
The box used to cover it is yellow
The box used to cover it is yellow
The plant is performing cellular respiration and releasing CO2
The plant is performing cellular respiration and releasing CO2
All Answers 1
Answered by
GPT-5 mini
AI
Correct answer: The plant is performing cellular respiration and releasing CO2.
Explanation: In the dark the plant cannot photosynthesise but still respires, producing CO2. Dissolved CO2 forms carbonic acid, lowering the pH of the indicator solution and causing it to turn yellow. Photosynthesis would remove CO2 (not happen in the dark), the box colour is irrelevant, and while decay could also release CO2, the immediate cause is normal cellular respiration.
Explanation: In the dark the plant cannot photosynthesise but still respires, producing CO2. Dissolved CO2 forms carbonic acid, lowering the pH of the indicator solution and causing it to turn yellow. Photosynthesis would remove CO2 (not happen in the dark), the box colour is irrelevant, and while decay could also release CO2, the immediate cause is normal cellular respiration.
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