The electromagnetic spectrum is made up of a: sound waves and light waves b: only light waves that you can see c: light waves you can see and waves of higher energy radiation d: light waves you can see and waves of both higher and lower energy radiation

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