BTB was used to indicate the amount of carbon dioxide present in the test
tubes. A plant was placed in each test tube. The test tube on the left was
placed in the dark and the one on the right was in the light. Which of the
following best explains the results?
The solution in the right test tube became more blue because the algae was doing
more photosynthesis and using carbon dioxide.
The solution in the right test tube became more blue because the algae was only
doing cellular respiration and producing carbon dioxide.
The solution in the right test tube became more yellow because the algae was only
doing cellular respiration and using carbon dioxide.
The solution in the right test tube became more blue because the algae was doing
more photosynthesis and producing carbon dioxide.