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1 - GEOCITIES.ws

... 34.___List the 4 types of biomolecules and their monomeric and polymeric forms. 35.___Enzymes are organic compounds classified as _______________. 36.___List the properties of water due to hydrogen bonding. 37.___In water, hydrogen bonding occurs between hydrogen in one molecule and 38.___Define buf ...
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Symbiogenesis



Symbiogenesis, or endosymbiotic theory, is an evolutionary theory that explains the origin of eukaryotic cells from prokaryotes. It states that several key organelles of eukaryotes originated as a symbiosis between separate single-celled organisms. According to this theory, mitochondria, plastids (for example chloroplasts), and possibly other organelles representing formerly free-living bacteria were taken inside another cell as an endosymbiont around 1.5 billion years ago. Molecular and biochemical evidence suggest that mitochondria developed from proteobacteria (in particular, Rickettsiales, the SAR11 clade, or close relatives) and chloroplasts from cyanobacteria (in particular, nitrogen-fixing filamentous cyanobacteria).
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