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Bio Week 1 notes

by: kayla Notetaker

Bio Week 1 notes BIOL 1201

kayla Notetaker
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About this Document

Covers Prokaryote, Eukaryotes, Charles Darwin, Primative earth atmosphere, etc.
Principles fo Biology: Organisms & Diversity
Dr. Amal Abu-Shakra
Class Notes
Biology, origins of life, ch.1, prokaryotes, eukaryotes, Primative Earth




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This 2 page Class Notes was uploaded by kayla Notetaker on Saturday February 20, 2016. The Class Notes belongs to BIOL 1201 at North Carolina Central University taught by Dr. Amal Abu-Shakra in Spring 2016. Since its upload, it has received 15 views.


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Date Created: 02/20/16
Origins of Life  Last Universal Common Ancestor (LUCA)  Most Recent Common Ancestor (MRCA)  Universal Traits for living things: 1. Acquire- energy through metabolism 2. Respond- to their environment 3. Interact- with their environment 4. Reproduce 5. Adaptation  Charles Darwin= Natural Selection- Survival of the fittest  Symbiosis= mutualistically beneficial Primative Earth’s Atmosphere  Water vapor  Nitrogen  Carbon dioxide  Small amounts of hydrogen, methane, ammonia, and hydrogen sulfide  Little free oxygen Chemical Evolution: Increase in complexity of chemicals that lead to the first cells  Lead to biological evolution Stanley Miller= Operin/ Haldane Hypothesis:  The experiment that shows that reactions among gases can produce small organic molecules Anaerobic growth= Fermentation Polymer evolution:  Protein-First Hypothesis: Protein enzymes came before DNA genes  RNA-First Hypothesis: Only RNA needed for the formation of the first cells; DNA genes came later An Era is larger than a Period. A period is larger than an Epoch. Prokaryotes: Domains- Bacteria and Archaea Cyanobacteria- Photosynthetic; adds oxygen to the atmosphere Aerobic bacteria- oxygen is necessary Rise of Eukaryotes Contain a true nucleus as well as other membranous organelles Most are aerobic Endosymbiotic Theory:  Mitochondria: were once aerobic prokaryotes  Chloroplasts: were once photosynthetic prokaryotes Mutualism- both benefit Commensalism: 1 benefits, the other is unaffected Parasitism: 1 benefits, the other is harmed Chloroplast V.S. Mitochondria 1. Similar in size to bacteria 2. Have their own DNA and make their own proteins 3. Divide by binary fission 4. Have different outer and inner membranes


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