Title: ORIGIN
1ORIGIN EVOLUTION OF LIFEFIRST ATMOSPHERE
Why important to life? CH 2.3
2LIFE OCCURS IN WATER
Chemical Structure Attributes
3ORIGIN EVOLUTION OF LIFESynthesis of Organic
Compounds
- Organic Compounds?
- Proteins
- Complex carbohydrates
- Lipids
- Nucleic acids
- Assembled from smaller organic compounds
- Simple sugars Amino acids
- Fatty acids Nucleotides
-
SEE CHAPTER 2
4ORIGIN EVOLUTION OF LIFESynthesis of Organic
Compounds
- Source of energy driving assembly?
- Evidence?
- Stanley Miller conducted 1st experimental test of
prediction. See Figure 15-2, p. 259
POSSIBLE
ACTUAL
5ORIGIN EVOLUTION OF LIFESynthesis of Organic
Compounds
- Mixture
- Water
- Methane
- Hydrogen
- Ammonia
- Exposed to spark discharge
- Yielded amino acids in 2 weeks
- Assumption?
-
6ORIGIN EVOLUTION OF LIFEEmergence of First
Living Cell
- What is Life? See pp. 8 - 10
- Store and process information
- Replicate
- Store and process energy
- Compensatory response to environment
7ORIGIN EVOLUTION OF LIFEEmergence of First
Living Cell
- What is Life? See pp. 8 10
- Nothing lives without DNA
- Nothing lives without energy
8LIFE ASSEMBLES ITSELF INTO CHAINS
9LIFE ORGANIZES WITH INFORMATION
- How to maintain constant temperature
- How to replace worn-out parts
- How to defend against invaders
- How to get energy out of food
10ORIGIN EVOLUTION OF LIFEEmergence of First
Living Cell
- What is Life? See pp. 8 - 10
- Store and process information
- Replicate
- Store and process energy
- Compensatory response to environment
11ORIGIN EVOLUTION OF LIFEEmergence of First
Living Cell
- What is Metabolism?
- Reactions by which cells
- harness energy and use
- it to drive their activities
- Capacity to (1) obtain and convert energy from
surroundings and (2) use energy to maintain
itself, grown and make more cells
12LIFE RUNS ON SUGAR
13ORIGIN EVOLUTION OF LIFEEmergence of First
Living Cell
- Origin of Agents of Metabolism
- Origin of Self-Replicating Systems
- Origins of First
- Plasma
- Membrances
See 15.1 Textbook
14ORIGIN EVOLUTION OF LIFEFIRST ATMOSPHERE
- Any Water?
- Liquid water and
- bilayer membranes
- Membrane and cell
- At most basic level Cell Life
15LIFE NEEDS AN INSIDE AND AN OUTSIDE
16ORIGIN EVOLUTION OF LIFE
- Origin of Earth 4 billion years ago
- Life appeared on Earth 3.8 billion years ago
- Evolution of the diversity of life