How a change in ph can affect an enzyme

The response is the basis for vaccination. primary secondary tertiary none of the above

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

49 ! how are energy cycles and growth cycles related?