Six Unifying Principles

By: Jasmine Siriouthai

Biology is the study of life and how organisms interact to the environment

• Organism:

– anything that demonstrates all of the unifying

themes of biology

• Environment:

– an organism’s surroundings

• to be considered alive, need to exhibit ALL unifying themes.


• “A” = without

• “Biotic” = life

– “Abiotic” = without life

Unifying Theme #1

Unifying Theme #2

Unifying Theme #5