Question

which of the following correctly lists the levels of organization from smallest to largest?
organ → cell → tissue → organ system → organism
cell → tissue → organ → organ system → organism
tissue → organ → organism → organ system → cell
organism → organ → tissue → cell → organ system

Explanation:

In biology, the hierarchical levels of organization start with the cell (the basic unit of life). A group of similar cells forms tissue. Different tissues combine to make an organ. Organs work together to form an organ system. Multiple organ systems make up an organism.

Answer:

Cell → Tissue → Organ → Organ System → Organism