15.Which of the following contain the genetic code? (Choose one: carbohydrates, nucleic acids, proteins). 16.Which of the following provide the most readily available energy? (Choose one: carbohydrates, lipids, nucleic acids, proteins).

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