Which of the following is part of the cell theory? a. cells are able to make new organisms. b. cells are independent structures. c. all cells are the same. d. all cells are produced from other cells.

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