01:119:115 Lecture Notes - Lecture 4: Symbiogenesis, Plastid, Eukaryote

• School: Rutgers University
• Department: Biological Science
• Course: 01:119:115
• Professor: Dr.Christy Beal

Document Summary

Lecture 4 notes: origin of life, abiotic synthesis. Step 1: 4 regulations (conditions of early earth: little or no free oxygen. Low o2->reducing environment: source of energy: builds biological molecules. From violent thunderstorms, volcanic action, meteorites, radiation: presence of chemical building blocks. Water, inorganic materials, in atmosphere: co2, h2o vapor, co, h2, n2: time. 1920s-> life formed near earth"s surface and conditions of early earth favored spontaneous formations of simple organic molecules. Made early earth conditions-> formed amino acids and other organic molecules. Life formed at cracks of ocean floor-> hydrothermal vents. Monomers polymerize on hot sand, clay, or rock. Lipids and other molecules form vesicles spontaneously in water. Organic polymers show signs of living cells: osmosis, homeostasis, divide. No fossils for transition from nonlife to life: fossil record formation. Geologic record: 4 eons-> hadean, achaean (first cells), proterozoic (first eukaryote), 1st heterotrophs->fermentation to get energy (eats other stuff) O2 revolution: many organisms died because of oxygen abundance.