1. 1-3 Studying Life

2. Biology Bio- means life in Latin -ology is the study of
Biology literally means the study of life
Biology can study anything that deals with a living thing (organism)
Many biologist specialize in just one area of biology
Example: Zoologists study animals; Botanists study plants; and ecologists study the environment

3. Characteristics of living things
Are made up of cells
Reproduce
Are based on a universal genetic code (DNA)
Grow and develop

4. Characteristics of living things (continued)
Obtain and use materials and energy (metabolism)
Respond to their environment
Maintain an internal balance (homeostasis)
Change over time (groups of organisms)

5. Branches and Levels of Study
Molecules
Cells
Tissues
Organs
Organ systems
Organism
Population
Community
Ecosystem
Biosphere