In which parts of the kidney are nephrons located? . . a. renal vein and renal artery. . b. renal pelvis and renal vein. . c. medulla and cortex.

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