ENVR 202- Final Exam Guide - Comprehensive Notes for the exam ( 65 pages long!)
29 Mar 2018
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Document Summary
How long have we had water around: need to look at presence of rock and types. Interpretation based on what you find: solid part remains and needs to be buried and preserved, bias allot of ocean data, also over represented. Evidence of early life: cyano-bacteria fossils, debated if it is carbon based. Origins of life: atmosphere is made up of gases, begin where oxygen comes into play, ozone helps protect against uv radiation. Composition: carbon based, 4 electrons = 4 different connections, good backbone for making materials. Prokaryote: very simple, have a membrane and capsule to protect themselves. Inside the cell is just allot of dna (have one molecule of dna one chromosome) Archaea: similar to bacteria, no nucleus just allot of dna, but not bacteria inhabit different places (extreme environments, low oxygen. Eukaryote in the fossil record: difficult, cannot exclude prokaryotic origin. If bacteria is stressed then membrane becomes leaky to incorporate.
