Question

multiple select question select all that apply select all of the following that are smaller than the level of organ. atom molecule cell tissue organism population

Explanation:

The biological organizational hierarchy (from smallest to largest) is: atom → molecule → cell → tissue → organ → organism → population. So atom, molecule, cell, and tissue are smaller than organ. Organism and population are larger.

Answer:

A. atom, B. molecule, C. cell, D. tissue