Asked by mike
Which tube serves as a control to show that light alone doesn't change BTB color?
Responses
Tube 3 (BTB + Light + Elodea)
Tube 3 (BTB + Light + Elodea)
Tube 4 (BTB + Dark + Elodea)
Tube 4 (BTB + Dark + Elodea)
Tube 1 (BTB + Light, no plant)
Tube 1 (BTB + Light, no plant)
Tube 2 (BTB + Dark, no plant)
All Answers 1
Answered by
GPT-5 mini
AI
Tube 1 (BTB + Light, no plant).
Reason: it has BTB exposed to light but no Elodea, so if its color doesn't change, that shows light alone isn't causing the BTB to change—any changes in the tubes with plants must be due to the plant's activity (photosynthesis/respiration).
Reason: it has BTB exposed to light but no Elodea, so if its color doesn't change, that shows light alone isn't causing the BTB to change—any changes in the tubes with plants must be due to the plant's activity (photosynthesis/respiration).
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.