1. Chapter 1
Chapter 1: Exploring Life

2. Unifying Themes in Biology
Evolution~ biology’s core theme; differential reproductive success (sex!)
Emergent Properties~ hierarchy of life
The Cell~ all organism’s basic structure
Heritable Information~ DNA
Structure & Function~ form and function
Environmental Interaction~ organisms are open systems
Regulation~ feedback mechanisms
Unity & Diversity~ universal genetic code
Scientific Inquiry~ observation; testing; repeatability
Science, Technology & Society~ functions of our world

3. Hierarchy of Organization
Molecule
Organelle
Cells
Tissues
Organ
Organism
Population
Community
Ecosystem

4. Feedback Regulation: Negative
Accumulation of an end product of a process slows that process
Example: sugar breakdown generates ATP; excess ATP inhibits an enzyme near the beginning of the pathway

5. Feedback Regulation: Positive
An end product speeds up its production
Example: blood clotting in response to injury

6. The Process of Science The Scientific Method
Hypothetico-deductive reasoning
“If….then” Logic
Hypothesis vs. Theory