1. Chapter 1: What is Life? • Hierarchy, levels of biological structure
Fig 1.3
Fig 1.10, 1.11
Fig 1.16, 1.17
Chapter 1: What is Life?
• Hierarchy, levels of biological structure
• Properties of life (at least 7)
• Evolution, Unity and Diversity
• Scientific Method

2. Life’s Hierarchical Order (figs 1.2, 2.1)
(atoms), (organelles)
Cells
Tissues
Organs
Organism
Population *
Community *
Ecosystem *
Emergent properties

3. Emergent Properties:
Novel properties which result from interactions between components.
An organism is a living whole, greater than the sum of its parts.

4. Is it alive? (fig 1.3)
Organisms are open systems & interact with their environment
Fig 1.3 lists 7 common characteristics
Why aren’t bubbles alive? Demo…
Why aren’t viruses alive?

5. What is life? NASA’s Working Definition of Life
Life is capable of metabolism, (chemical reactions which utilize energy and also synthesize its cellular constituents.) Second, life is capable of self replication. Third, life can evolve in order to adapt to environmental changes. Life is a community of organisms which must interact with their nonliving environment through processes called biogeochemical cycles.

6. Examples of Cells

7. Homeostasis Fig 1.8 Feedback mechanisms of living things Negative Ex.
Blood glucose levels
Body temp.
Positive Ex.
Breast feeding
Blood clotting

8. Domain (3) Classifying Life Fig 1.10 K,P,C,O,F,G,S General to specific5?
Classifying Life
Fig 1.10
K,P,C,O,F,G,S
General to specific

9. Fig. 1.11 review page 11 Domains of Life (3)
1. Bacteria (prokaryotes, most ancient)
2. Archaea (prokaryotes, extreme )
3. Eukarya (eukaryotes = protists, plants, animals, fungi)

10. Hypothetico-deductive Reasoning

12. Sources
Campbell, Reece, Mitchell. Biology, 5th Ed , Chapter one. Pgs
Campbell, Reece, Mitchell. Biology, 5th Ed , Presentations CD-ROM.
Click art CD-ROM, Broderbund.

13. Unit One, the Chemistry of Life
T.O.D.
Dr’s. Mario Molina, Paul Crutzen, F. Sherwood Rowland Nobel Prize
Ozone Layer and pollutants

14. IS IT ALIVE?