Origin of the eukaryote type

Origin of the eukaryote type - . differentfromtoday's....

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Origin of the eukaryote type . Biologists in general agree that early organisms were prokaryotes  that developed ways to survive on a young Earth whose atmosphere and conditions were much  different from today's. Descendants of these ancient prokaryotes—the organisms of today—carry in  their genes solutions to old problems as well as modifications made over 3.5 billion years in  response to changing Earth conditions.  Serial endosymbiotic theory The mitochondria and chloroplasts of plants differ from other organelles in their semi-independence.  In many ways they resemble bacteria: Both bacteria and the organellescan divide, their DNA is  organized similarly, and both have small ribosomes. Additionally, antibiotics inhibit protein synthesis  in ribosomes of mitochondria, chloroplasts, and bacteria, but have no effect on synthesis in  cytosomal ribosomes of eukaryotic cells. These structural and physiological differences lead some 
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