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Lecture 3

BIOA01H3 Lecture Notes - Lecture 3: Photosynthesis, Lipid Bilayer, CyanobacteriaPremium

Biological Sciences
Course Code
Maydianne Andrade

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BIOA01H3: Life on Earth – Unifying Principles – Lecture 3: Defining Life and its origins
(History of Life) Continued
Tree of Life:
Earth was formed 4.6 billion years ago (Organic molecules were produced)
Earliest forms of life were simple prokaryotic cells (4.0 billion years ago)
Oxygenic photosynthesis develops into autotrophs (3.5 billion years ago)
- Autotrophs create their own energy, photosynthesize
- Used minerals from rocks
- Lived in deep-sea vents
Unicellular Eukaryotes came then:
- Multicellular Eukaryotes
- Invertebrates
- Vertebrates
- Land plants
- Sea plants
- Reptiles
- Dinosaurs
- Birds
- Flowers
- Hominids
- Present
Layers and layers of bacteria and rock to create fossils
Phylogenetic Trees:
Are branching diagrams representing evolutionary relationships among groups of
3 Domains of Life:
Bacteria, Archaea and Eukarya
These 3 domains come from LUCA (Last Universal Common Ancestor)
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