BIOL 1510 Lecture Notes - Lecture 3: Maximum Likelihood Estimation, Polyphyly, Paraphyly
Document Summary
To make life, need to go from inorganic to organic you can"t evolve life now because life now will eliminate it. 1: we have a lot of oxygen in the atmosphere, because oxygen breaks down compounds. Ex: warm little pond redid exp. and found amino acids: next step to make life- you need small organisms and large organisms. Ex: hemoglobin holds on to iron which carry oxygen regulated by enzymes to drive reaction. Nucleotides --> nucleic acids volcanoes also help form sm. orgs. o big orgs: next step to make life- rna (respond to natural selection) Rna: variation- yes they have in code, consequences- di erent codes means di erent things, heritability- every time it makes a copy of itself. It can do thins like the ribozymes. 5 individual genes now working together - change in individuality each gene can provide something- division of labor.
