1. Characteristics of Life
1) made of cells
2) reproduce
3) DNA
4) grow and develop
5) obtain materials for energy
6) respond to environment
7) stable internal environment
8) evolve

2. Unicellular and multi-cellular

3. CELLS

4. Cells

5. Chapter What is Life?
Reproduce
Asexual reproduction - involves a single parent; offspring are genetically identical to the parent.
Sexual reproduction - involves 2 parents; offspring are genetically diverse. – DNA from both parents

6. DNA –deoxyribonucleic acid

7. DNA is the genetic code that instructs the cells what to do
DNA is the genetic code that instructs the cells what to do. Also give inheritance

8. grow

9. Differentiation is when cell change into different cells that perform other functions

10. Develop means to change

12. Plants get ENERGY by photosynthesis

13. Animals get ENERGY by eating other organisms

14. Decomposers (bacteria and fungi) get Energy by feeding on dead plants and animals

15. Respond to environment
Trees loose leaves in the fall

16. Maintain internal stable environment
Called homeostasis
EXAMPLE– HUMAN BODY TEMPERATURE
WHEN YOU GET HOT --- SWEATING
WHEN YOU GET COLD -- SHIVERING

17. EVOLVE TO CHANGE OVER TIME Life is always changing…..
On the level of DNA……
Change = Evolution