1. BIOLOGY

2. Biology The Study of Life
Bio = “life” logy = “study of”

3. 8 characteristics of life
How do you know if something is living?

4. Made of Cells- the smallest unit of life
Unicellular = 1 cell
Multicellular =many cells
Differentiation = cells look different and perform different functions (different cells perform different jobs

5. 2. Ability to Reproduce – producing offspring
Sexual = DNA from 2 different parents
Asexual = single parent (cloning, budding)

6. 3. Genetic Code – “blueprints”
Directions for inheritance (DNA) – What makes you, you!

7. 4.  Growth and Development
Growth = getting larger
Development = changing shape and structure

8. 5.  Use Energy
Metabolism = sum total of all the chemical reactions in the body
Animals eat to obtain energy using cellular respiration
Plants obtain energy through photosynthesis

9. 6. Response to Environment
(environmental interaction)
Stimulus = a signal
Response = a reaction

10. 7.  Internal Balance
Homeostasis – maintaining stable internal environment (sameness)

11. 8. Evolution 8. Evolution - species change over time

12. Levels of Organization
Molecule (smallest)
Cell
Tissue
Organ
Organ Systems
Organisms
Population
Community
Ecosystem
Biome
Biosphere (largest)

13. Some of the Major Branches of Biology
Zoology – animals
Ecology – how animals interact
Ethology – animal behavior
Botany – plants
Cytology – cells
Genetics - heredity
Paleontology – ancient life