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Origin of Life (Phylogeny is the evolutionary history of species =…
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Chapter 25
**The History**
- Synthesis of small organic molecules
- Joining of these small molecules into macro molecules
- Packaging of molecules into protocells
- Self-Replicating RNA
Haldane hypothesized that Earth's early atmosphere was a reducing (electron adding) environment, where organic molecules were formed from simpler molecules
Hydrothermal Vents- areas on the seafloor where heated water and minerals gush from Earth's interior
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Vesicles split, passes on the RNA, and daughters would be protocells
Morphological Differences are a result of genes that alter the rate, timing, and pattern of change
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TIME- Paedomorphisis a condition when a species remains body features that were juvenille structures
SPECIAL PATTERN- Homeotic Genes- Master regulatory genes determine basic features (ex. how plant flower parts are arranged)
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Plate Tectonics- the continents are part of a great plates of Earth's crust that essentially float on the hot portion of the mantel
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Chapter 26
Phylogenetic tree
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Characters
A Shared Ancestral Character derived in an ancestor of the taxon
(ex. lungs- everyone who lives on land)
VERY BROAD "what everyone has"
A Shared Derived Character is an evolutionary novelty unique to a particular clade (ex. hair/ fur) MORE SPECIFIC
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