Introduction: Biology Today

1
Chapter 1

• Introduction Biology Today

2
The Scope of Biology

• Universe
• Earth
• Forest
• Tree
• Leaf
• Leaf cells
• DNA

3
Ecosystems the home of life
4
Cells the building block
5
The Three Domains
Archaea
Bacteria
Eukarya
6
Evolution the underpinnings
7
Darwins Travels
Lamarck - adaptations
Wallace natural selection
8
Galapagos Finches
9
Natural Selection
Overproduction Individual Variation Unequal
Reproductive Success
10
Artificial Selection
11
The Process of Science
12
Hypotheses and Theories

• Hypotheses mechanistic explanation of an
  observation (speckling helps moths hide on tree
  bark)
• Theory broad explanation of a collection of
  observations (color adaptations evolve by
  natural selection)

13
Technology and Society

• Advances in knowledge
• Advances in ability
• How far can we go?
• How far should we go?

14
Summary

• Cells and Ecosystems
• Three Domains Bacteria, Archea, Eukarya
• Evolution
• Process of Science
• Hypotheses vs. Theories
• Technology and Society