1. What is Biology & Characteristics of Life

2. What is Biology??? Bio- = life -logy = study of
BIOLOGY = study of life (living things)
ORGANISM = a living thing

3. What do biologists study?
Organisms
Interactions of organisms with their environments
How to conserve resources and preserve species
Solutions to human problems

4. What is a living thing??
LET’S BRAINSTORM!!

5. Is FIRE living?
Why might someone consider fire to be living?

6. Characteristics of Life
CONTAIN CELLS
- one cell = unicellular (ex. Protists, bacteria)
- more than one cell = multicellular

7. Characteristics of Life
CONTAIN DNA
- coded instructions for life
- passed on from parent to offspring

8. Characteristics of Life
3. REPRODUCTION = production of offspring
- essential for survival of SPECIES!

9. Characteristics of Life
4. GROWTH (adding biomass)
AND
DEVELOPMENT (structural/chemical changes)

10. Characteristics of Life
5. OBTAIN AND USE ENERGY (metabolism)

11. Characteristics of Life
RESPOND TO STIMULI
(reacts to environment)

12. Characteristics of Life
7. MAINTAIN AN INTERNAL BALANCE (homeostasis)

13. Characteristics of Life
EVOLVE AS POPULATIONS
- individuals DO NOT evolve!

14. Levels of Organization in an Organism
Atoms
Molecules
Cell Part (Organelle)
Cell → unicellular organism ↓
Tissue (ex. muscle)
Organ (ex. stomach)
Organ System (ex. digestive)
Multicellular Organism

15. Levels of Organization in an Ecosystem
Population Community Ecosystem Biome Biosphere