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Bio 152 Intro lect

TermDefinition
Microbiology study of 'microscopic' organisms referred to as 'microorganisms' or 'microbes' most microorganisms are single cell organisms.
Archea/Bacteria-prokaryotes Bacteria and archaea referred to as 'prokaryotes'. Lack membrane enclosed nucleus.
Eukaryotes membrane enclosed nucleus likes protists and fungi.
Acellular microorganisms -viruses
Disease causing microbes -pathogens.
Diversity of microorganisms
Phylogenic tree of life Naming organisms
History of life on earth Microbes have inhabited Earth for much of its existence (contrast with animals and plants) Earth is 4.6 byo 0 byo Earth is formed. 0.7 byo liquid water becomes present. 0.8-1.1 origin of life on Earth (prokaryotic) 1.7-2.1 cyanobacteria begin to p
Endosymbiotic theory Some organelles may have originated from by endosymbiosis, when larger cell engulfed smaller ones. -Mitochondria (sites of energy generation) probably evolved from engulfed prokaryotic organisms -chloroplasts (sites of photosynthesis) probably evolv
Tree of Life The tree of life consists of phylogenetic trees that show evolutionary relationships between organisms. We compare genomes tro identify evolutionary relationship of species. Relationships in the tree of life are based on fossil evidence, structures, metab
rRNAs are ideal molecules to contruct a phylogenetic tree because... all organisms have ribosomes and rRNA does not change rapidly.
Created by: cbosley
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