A citizen, who voluntary self-identifies as a party member, functions as the smallest unit of the party organization.
A cell is the smallest unit of an organism
Species
mohawk
population
dscd
Interacting With Other Species
organ, or unit e.g. a flower Population
The cell is the level of organization that is the smallest unit of life. Cells working together make tissues.
field
cell (smallest unit), tissue, then organs, and finally the organ system which is the largest unit of organization
cell The Cell is the smallest metabolically functional unit of life.1 1. http://en.wikipedia.org/wiki/Cell
The level of biological organization is composed of tissues is a organ. The smallest unit that has all of the characteristics of life is the cell.