BIO 1000 Lecture Notes - Lecture 3: Stanley Miller, Golgi Apparatus, Genetic Drift
21 Feb 2017
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Document Summary
Cell is composed of cytoskeleton: made up of proteins. Any living organism is an open system: interacting with environment. All species past or present are related: evolution. Vertical gene transfer: passing down genes from generation to generation. Nucleic acids: first biological molecule: store genetic info,self-replication. Reducing atmosphere hypothesis: stanley miller experiment, reducing=adding electrons. Extraterrestrial hypothesis: biological molecules were present in meteroes. Deep sea-vent hypothesis: deep vents in oceans produced these biological molecules. Environmental alterations: atmospheric change, climate change, landmasses, meteoric impacts, glaciation, floods. Endosymbiotic theory: pre-eukaryotic cells phagocytosed a unicellular organisms. It contains histone proteins, ribosomal proteins and rna polymerases. Most bacteria: live in modest environment, cell wall, ester bonded phospholipids. Without the presence of cyanobacteria, it would take millions of more years. Defense mechanism: use mucilage to invade and colonize. Syntrophy:same species of bacteria that share the nutrients with each other. Species: group of related organisms that are capable of interbreeding and producing offspring.
