2points
the ph indicator bromothymol blue turns yellow when co2 gas is added to a
solution and blue when co2 is removed from a solution. an experiment will
test how the intensity of light affects the rate of photosynthesis in algae.
which of these should be a control for this experiment?
o
a. algae that are placed in a blue solution and kept in direct sunlight
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b. algae that are placed in a yellow solution and kept in the mark
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c. algae that are placed in a yellow solution and kept in direct
sunlight
o
d. algae that are placed in a blue solution and kept in the dark
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