In the experiment that you performed, why did Tube 1 change color when placed in the dark?
Understand the Problem
The question is asking for an explanation of why Tube 1 changed color when placed in the dark, relating to photosynthesis and respiration processes in plants.
Answer
The plant was performing cellular respiration, releasing carbon dioxide.
The plant was performing cellular respiration, releasing carbon dioxide. This carbon dioxide formed a weak acid, altering the color of the indicator in the tube.
Answer for screen readers
The plant was performing cellular respiration, releasing carbon dioxide. This carbon dioxide formed a weak acid, altering the color of the indicator in the tube.
More Information
In the absence of light, photosynthesis cannot occur, so plants rely on cellular respiration, releasing carbon dioxide, which can lead to a color change if an indicator is present.
Tips
Avoid confusing photosynthesis with respiration; photosynthesis requires light, whereas respiration occurs in its absence.
