I. Age of the Earth Origins of Life A. Time Frames

I. Age of the Earth

Origins of Life

A. Time Frames

Figure 25.7

Table 25.1

B. Evidence

1. Fossil Strata

Figure 25.4

2. Radiometric Dating

Figure 25.5

II. Earth Changing Events

A. Temperature Cycling

B. Sea Level ChangesC. Shifting

Continents

Figure 25.13

Figure 25.14

Figure 25.15

III. Organism DiversityA. Before

Life

1. Events

a. Spontaneous Generation

b. Early Atmosphere

2. Outcomes

What was the most important molecule?

Figure 4.2

B. After Life

1. Events

2. Outcomes

Oxidizing atmosphere

Eukaryotes and endosymbiont hypothesis

C. Explosions & Extinctions

1. Events

Volcanoes, Meteor Strikes, &

Figure 25.16

Chicxulub

2. Outcomes

& Competition

New habitats and Niches

Figure 54.3

IV. Phylogeny & Systematics

How to define parameters and why study?Classic Tree

Figure 26.3

How to define parameters and why study?Classic Clade

Figure 26.11a & b

Phylogeny and Cladistics

Phylogeny and Cladistics

Figure 26.14

Strive and be alive.