BIOL 111 Lecture Notes - Lecture 2: Exergonic Reaction, Heritability, Cyanobacteria

• School: McGill University
• Department: Biology
• Course: BIOL 111
• Professor: Graham Bell

Document Summary

4. 5 bya: formation of planet by accretion impact on earth with large planetoid: moon, spin, tilt. >arizona meteor crater (iron)-> vaporized during its landing. > atmosphere of co2, h2o ch4, and sulfur gas. > metamorphosed granite because of extreme temperature and pressure. > formed during the hadean, earliest eon in history. > taken seriously because of very short interval between the appearance of permanent. > radiation: very unlikely, because they usually die in the process. > bullshit: until 19th century, because of progress in geology, and later, evolutionary biology. Panspermia: theory that life came from outside, different speculations: >undirected panspermia: dispersal of microbes planet from planet ocean and first sign of life. Really? about the age of the oldest planet. > seems likely they would survive the atmospheric heating and impact. >according to nasa, there"s about 300k spores per spacecraft, 300 per m^2. >attraction of this speculation: happened in the past with humans.