Please enable JavaScript.
Coggle requires JavaScript to display documents.
Evolution (cont.) (The Tree of Life (Phylogeny: the evolutionary history…
Evolution (cont.)
The Tree of Life
-
-
-
Phylogenetic Trees
Sister Taxa
- organisms that share immediate common ancestor (not shared with other groups)
Basal Taxon
- lineage that diverges from other members in its group
History of Life on Earth
Fossil Record
- an incomplete chronicle of evolution
- many fossils were destroyed by geologic processes
Dating of Fossils
Radiometric Dating : based upon decay of radioactive isotopes
- rate of decay is expressed by "half-life"
-
Conditions on Early Life
- Macromolecules formation: proteins and nucleic acids
- Protocells: beginning of membranes
- Abiotic synthesis of small organic molecules
- Self Replicating molecules