Biology 1001A Lecture Notes - Lecture 3: Peptide, Abiogenesis, Transferase
Document Summary
Viruses depends on other form of life, they have dna and proteins, they can evolve. Earth is 4. 6 billion years old (should know the number 4. 6 billion years) Geological evidence dates back to 3. 5 billion years ago; stromatolites: cyanobacteria. Start of life might be started around 4. 0 billion years ago. 3 branches from the tree of life: bacteria, archaea, eukaryotes (pp p: luca: last universal common ancestor. Every kind of life right now is derived from the last universal common ancestor: all three branches have in common: Dna to rna to protein transfer of information. What came before luca: many forms of life may have existed before luca, they may not have had dna, lipids, make proteins etc. but they died off and left. Luca: maybe no, dna, no rna, no lipids, lots of branches of life, but they all died of except luca. Prokaryotes don"t exist: no single group of organism, archaea and bacteria are not related.
