5. All cells a. Are enclosed in a membrane that maintains internal conditions different from the surroundings
b. Have DNA as genetic material
c. Require energy to function
d. All of the above are correct

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