1. Study of Biology 1

2. What is Biology? Biology Living things are called Organisms include 2

3. All Living Things Share Common Characteristics 1. Basic Unit is the 2. They 3. All Based On Universal Genetic Code 4. 3

4. Common Characteristics 5. Obtain & Use Materials & 5. To Their Environment 6. Maintain A 7. AS A GROUP, Living Things, That Is They Change Over Time 4

5. All Organisms are made of Cells 5

6. Facts About Cells  Cells are the smallest living unit of an organism  Organisms are Grouped by their Number of Cells Unicellular Organisms - Living Organism Made Up Of One Cell Multicellular Organisms - Living Organism Made Up Of Many, Specialized Cells 6

7. Organisms Reproduce to Pass on their Genetic Traits 7

8. Two Types of Reproduction 8 Involves 2 parents Egg fertilized by sperm to make a ZYGOTE Offspring DIFFERENT from parents

9. Two Types of Reproduction 9 Involves a single organism or cell Cell divides Offspring IDENTICAL to parent

10. Cells Have a Genetic Code 10

11. Genetic Code  DNA ( ) carries the genetic code for all organisms  contain DNA 11

12. Organisms Grow & Develop 12

13. Growth & Development Organisms by producing MORE CELLS & by cell ENLARGEMENT Organisms as they mature into an adult organism 13

14. Cells Require Food & Energy 14

15. Food Requirements 15  -can make their own food Example: plants

16. Food Requirements  can NOT make their own food  They must consume other organisms  eat plants  eat meat  eat plants & animals 16

17. Organisms Respond to Stimuli  Organisms to (Temperature, Water, Food Supplies, etc.) 17

18. Homeostasis  Keeping The Internal Environment (Homeostasis) Of The Cell or Organism Within The Ranges Required For Life  Stable internal conditions of 18

19. Living Things Evolve (Not Individuals) Change Over Time In Order To Survive Within Changing Environments. Fossil records show changes in groups of organisms 19

20. Life is Organized on Several Levels 20

21. Levels  Atoms  Molecules  Organelles  Cells – life starts here  Tissues  Organs  System  Organism 21

22. Levels  Population  Community  Ecosystem  Biosphere 22

23. 23