Intro to life and science.

1. What is Life?

2. Characteristics of Life
1.) Reproduction, Growth, and Development

3. Characteristics of Life
2.) Order, Pattern, or Body Plan
Entropy – the tendency for disorder;
“… a cell is an island of low entropy in
an increasingly random universe.”

4. Characteristics of Life
3.) Evolutionary Adaptation

5. Characteristics of Life
4.) Energy Utilization and/or Production
Photosynthesis
Cellular Respiration

6. Characteristics of Life
5.) Homeostasis (Regulation and Response to
Environment)

7. Characteristics of Life
6.) Cells and DNA
All life is composed of cells.
Cell Theory
• The cell is the basic unit of structure and
function.
• All cells derive from previously existing
cells.
All life depends on DNA.
DNA is the genetic material:
• DNA encodes the properties of
an organism.
• DNA passes that information from
generation to generation.

8. The Hierarchy of Life

9. The Flow of Matter and Energy Through Biological Systems

10. The Scientific Method – An Example Based on
Natural Selection
An Example of Natural Selection:

11. The Scientific Method – An Example Based on
Natural Selection

12. Camouflaged decoys are less prone to attack: