1. Is It ALIVE???

2. What are living things?
Organism – any living thing

3. Characteristics of Living Things
All organisms must have cells
Cell – basic unit of life
Could be unicellular or could be multicellular

4. Characteristics of Living Things
2. All organisms must grow and change Development - organisms growing, changing, and becoming more complex 

5. Characteristics of Living Things
3. All organisms must use energy Metabolism – sum of the energy used plants  use energy from the sun to make food humans  use energy to ingest food, perform tasks, etc.

6. Characteristics of Living Things
4. All organisms must be capable of gas exchange
Plants: CO2 to O2
Animals: O2 to CO2

7. Characteristics of Living Things
5. All organisms must maintain an internal environment Homeostasis – maintaining a stable internal condition to remain alive (temperature, water content, heartbeat, etc.) Sweating Eating salty foods

8. Characteristics of Living Things
6. All organisms are able to reproduce Sexual reproduction – combining genetic info to make a new organism Asexual reproduction – splitting into 2 organisms *Not every member of a species will be able to reproduce  infertility