Answer:
B.- Molecule, cell, tissue, organ, organ system, organism
Explanation: Found it in the reading assignment, and double checked it to make sure it was right :)
The molecule, cell, tissue, organ, organ system, and the organism is arranged from least or smallest to the most or largest complex. Thus, option B is correct.
The level of an organization defines the relationship starting from simple to complex arrangements. It starts with the most simple and small order and further goes up to the complex and largest structures.
The molecules are the smallest structures after an atom that combines to form a cell. The cell is the fundamental unit that combines together to make a tissue that further forms an organ. The different organs combinedly form an organ system and finally an organism.
Therefore, the molecule is the simplest and the organism is the most complex.
Learn more about the level of organization here:
https://brainly.com/question/1889896
#SPJ2
