Characteristics of Living Organisms

What makes something alive?

Key Characteristics

Organized Structure Have an organized structure,

hierarchical systems Cells

Made of cells or cell products. Reproduction

Have an ability to reproduce.

More Key Characteristics

Growth / Development Have an ability to grow

and develop based on a genetic program / DNA.

Response Have an ability to

respond to the environment.

More Key Characteristics

Metabolism Obtain and use energy

to maintain cell functions.

Autotrophic Heterotrophic

Homeostasis Maintain relatively

constant internal body or cell conditions.

Deeper Thinking

Emergent Quality The whole is greater than the

sum of the parts. It’s a system!

What is Biology?

Bio = Life Logos = Study, Logic The study of living organisms and

their environment.

Disciplines of Study

Pure / Basic Science Genetics, cytology,

embryology, anatomy, zoology, botany

Applied Science Medicine, forestry,

agriculture, fisheries