How similar are daughter cells to each other and to the orginal parent cell?

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

Is dna the same in every cell in the human body explain your answer

This is the interaction of two organisms where one is and the other is neither nor harmed.