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### There are 8 common characteristics of living things: 1. The basic unit of life is the **cell** 2. **Reproduction** - sexual/asexual - **DNA** - **Develop** 3. Universal genetic code 4. **Growth and Development** - Ex: Caterpillar - Butterfly 5. How does an organism obtain energy - E...

### There are 8 common characteristics of living things: 1. The basic unit of life is the **cell** 2. **Reproduction** - sexual/asexual - **DNA** - **Develop** 3. Universal genetic code 4. **Growth and Development** - Ex: Caterpillar - Butterfly 5. How does an organism obtain energy - Eating, sunlight, cellular respiration, photosynthesis, metabolism 6. **Stimulus** - All organisms must react in order to survive. - React to light, temperature, touch, and sound 7. **Stable Internal Environment (Homeostasis)** - Maintaining constant internal conditions in an organism (balance) 8. **Evolution** - Change in living things over time. (**adaptation**) ### Cells - Basic unit of life. - **Multicellular** - multiple specialized cells - **Unicellular** - Once single cell - **Prokaryotic** - Bacteria or Protists - **Eukaryotic** - Animal, Plant, and Fungi ### Reproduction: - Reproducing of offspring and passing to offspring - **reproduction**, as budding, fission, or spore formation, not involving the union of gametes (sex cells). - **Sexual** - reproduction involving the union of gametes (sex cells). - Formation of genes, family resemblance, double helix ### Shape = DNA ### Growth + Development. - Maturing over a period of time. ### How does an organism obtain energy? - Eating, sunlight, cellular respiration, photosynthesis, metabolism #### **Stimulus** - All organisms must react in order to survive. - React to light, temperature, touch, and sound #### **Stable Internal Environment (Homeostasis)** - Maintaining constant internal conditions in an organism (balance). #### **Evolution** - Change in living things over time. (**adaptation**) *** Are Viruses considered living or non-living based on these characteristics?: **Answer:** non-living