Levels of Biological Organization

Front

Atom

Back

Basic unit of matter

Front

Molecule

Back

Two or more atoms bonded together

Front

Cell

Back

Basic unit of life

Front

Tissue

Back

Group of similar cells working together

Front

Organ

Back

Structure made of different tissues

Front

Organ System

Back

Group of organs working together

Front

Organism

Back

Individual living being

Front

Population

Back

Group of organisms of the same species

Front

Community

Back

Different populations living together

Front

Ecosystem

Back

Community plus the physical environment