| A | B |
|---|
| Atom | lowest level of organization |
| Molecules | groups of atoms |
| Organelles | groups of molecules working together to perform a function |
| Cells | groups of tissues working together |
| Tissues | groups of cells working together |
| Organs | groups of tissues working together |
| Whole Plant | groups of organs working together |
| Prokaryotic Cells | have no nuclear membrane and the organelles are indistinct |
| Eukaryotic Cells | have a nuclear membrane and distinct complex organelles |
