Ap Chap 25 The History Of Life On Earth

The History of Life on Earth AP Chapter 25

Figure 26.0 A painting of early Earth showing volcanic activity and photosynthetic prokaryotes in dense mats

Overview: Lost Worlds ,[object Object],[object Object],[object Object],[object Object],[object Object]

The Age of the Earth ,[object Object]

Figure 26.2 Clock analogy for some key events in evolutionary history

3.9 billion years ago ,[object Object],[object Object],[object Object]

Other ideas ,[object Object],[object Object],[object Object]

All of these point to the possibility of an abiotic synthesis of life. ,[object Object],[object Object],[object Object],[object Object]

Fig. 25-3 (a) Simple reproduction by liposomes (b) Simple metabolism Phosphate Maltose Phosphatase Maltose Amylase Starch Glucose-phosphate Glucose-phosphate 20 µm

First replicating molecule… ,[object Object],[object Object],[object Object]

Figure 26.11 Abiotic replication of RNA

How is the age of fossils and rocks determined? ,[object Object],[object Object],[object Object]

3.5 billion years First Single-Celled Organism ,[object Object]

Figure 26.3 Early (left) and modern (right) prokaryotes

2.7 billion years ago Oxygen ,[object Object]

2.1 billion years ago eukaryotic cells ,[object Object],[object Object],[object Object]

1.5 billion years ago Multicellular organisms ,[object Object],[object Object]

535 – 525 Cambrian Explosion ,[object Object]

500 mya Movement onto Land ,[object Object],[object Object]

250 mya Formation of Pangaea ,[object Object]

Mass Extinctions ,[object Object],[object Object],[object Object]

[object Object],[object Object]

Evolution is not goal-oriented! ,[object Object],[object Object]

Ap Chap 25 The History Of Life On Earth

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Ap Chap 25 The History Of Life On Earth