1. Characteristics of Life

2. 1. Contain DNA
DNA = genetic code

3. 2 . Need Materials and Energy
Metabolism: the way living things build up or break down materials in order to live.

4. 3. Grow + Develop

5. 4. Made of cells
Cells: the smallest unit of living things.

6. Unicellular: organisms that are made of one cell.
Multicellular: organisms that are made of more than one cell.

7. 5. Reproduce

8. 6. Maintain Internal Balance
Homeostasis: stable internal environment.

9. 7. Respond to Environment
Stimulus: the “signal”
Response: the “result”
phototaxis

10. 8. Adapt + Evolve
Evolution: change over time in a population NOT an individual