Question

levels of organization
which of the following represent the smallest unit that is capable of sustaining life?
atoms
organism
tissue
cell
macromolecule

Explanation:

Cells are the basic structural and functional units of life. They can perform all the necessary functions for life - such as metabolism, growth, and reproduction. Atoms are the building - blocks of matter but cannot sustain life on their own. Tissues are groups of cells, an organism is a living being made up of multiple cells or cell - systems, and macromolecules are large molecules like proteins and nucleic acids that are components of cells.

Answer:

Cell