BIL 150 Lecture Notes - Lecture 4: Alexander Oparin, Hemoglobin, Feldspar
Document Summary
Molecular complexity came from simple molecules: over billions of years, simplest molecules became advanced. Cosmology: study of the origin of the universe (says origin of life is big bang: Cosmology only studies what happened after expansion: analogy: if you inflate a balloon with dots on it, dots stay the same size but they get farther apart. Earth"s biological history: origin of solar system/earth, prokaryotes, single celled eukaryotes, multicellular eukaryotes, complex animals (paleozoic) Coelomates: animals with body cavity: age of mammals. Look at changes in sequences of nucleotides in dna of hemoglobin. Depending on how you measure, you will get different numbers. Chemical cycles lead to synthesis of organic molecules. Oparin and haldone: early earth had reducing atmosphere, little free oxygen to react. Miller and urey: make organics in lab. Tried to produce biomolecules in reducing atmosphere. Hydrothermal vents (black smoker=tip of volcano under ocean) Releases iron sulfide (iron is basic element of earth)
