Question

1. put the following terms in order from simplest to most complex: molecule, organ system, tissue, cell, organism, atom, organ

Explanation:

In the biological hierarchy of organization, atoms are the simplest units. Atoms combine to form molecules. Molecules make up cells, which are the basic unit of life. Groups of similar cells form tissues. Tissues work together to form organs. Organs cooperate to form organ - systems, and organ - systems make up an organism.

Answer:

Atom, Molecule, Cell, Tissue, Organ, Organ System, Organism