Justin is walking down the street when a loud bang comes from an industrial factory. He drops to the ground, sure it is a drive-by shooting in progress. Justin’s nervous system just kicked into high gear.

Astudent poured a solution of bromothymol blue indicator into three test tubes. then he placed an aquatic plant in two of the test tubes, as shown below. he placed a stopper on each test tube and placed them all in the dark for 24 hours. bromothymol blue turns from blue to yellow in the presence of co2