Which of the following has the highest organizational level of complexity?
A) Respiratory system
B) Chemistry
C) Heart
D) Cells
E) Tissues

Question

Quizplus · Accepted Answer

The respiratory system is the highest organizational level of complexity among the options given because it is a system that includes organs and structures responsible for gas exchange in animals and humans. It is more complex than the heart (an organ), tissues (groups of similar cells), and cells (the basic unit of life). Chemistry is a field of science, not an organizational level of biological complexity.

Which of the Following Has the Highest Organizational Level of Complexity