ACCT 210 Lecture Notes - Lecture 18: Nucleoid, Chlamydomonas Reinhardtii, Cyanobacteria
4 Jul 2020
School
Department
Course
Professor
Document Summary
Evolutionary history: organic molecules interacting with each other, abiogenesis the transition from inorganic substances to living organisms, early life, hereditary replication, compartmentalisation the beginning of membranes. Miller-urey experiment 1953: mimicked early conditions on earth, wet and warm, used sparks to mimic lightning, found organic molecules formed, amino acids, sugars etc. Therefore only rna has the ability to do both so is likely the first used by organisms. The rna world hypothesis has been widely supported and is the theory with the most potential. Early life: some form of hereditary information and replicators, amino acids that would have sped up rna reactions, natural selection would select stability, natural selection would also select for correct volumes of material. In come membranes and vesicles etc: reduced competition between replicators, this resulted in chromosomes. Properties of major transitions: small entities come together to create larger ones, multicellularity, colonies. Individuals work together in a colony for the good of the population: ratcliffe et al.
