Card Set Information
smallest unit of an element compposed of electrons, protons, and neutrons.
The union of two or more atoms of the same or different elements
The structural and functional units of all living things
A groups of cells with a common structure and function
Composed of tissues functioning together for a specific task
Composed of several organs working together.
An individual; Complex individuals containing organ systems.
Organisms of the same species in a particular area.
in a particular area.
A community plus the physical environment.
A sphere that contains life.