Which of the following is the most complex according to their cellular level of organization? by Sunday | Sep 6 | Biology JAMB | 0 comments A. Heart B. Hair C. Euglena D. Hydra Correct Answer: Option A – Heart Users Also Read These:STB 121 Theory Questions: Maintaining Cellular…''From each according to his ability to each…Which of the organs of the United Nations…Complex social behaviour and organization are found…An organism that operates at the cellular level of…