How to Respond to an Epidemic. Imagine an epidemic so virulent that it is the leading cause of death for children, teens, young adults. It takes 125,000 lives in America alone every year, not to mention causing nearly $80 billion in medical costs.
The origin of replication (also called the replication origin) is a particular sequence in a genome at which replication is initiated. This can either involve the replication of DNA in living organisms such as prokaryotes and eukaryotes, or that of DNA or RNA in viruses, such as double-stranded RNA viruses.
Endosymbiotic Theory of Evolution of Eukaryotic Cells. Diagram of a chloroplast. Diagram of a mitochondrion. THE THEORY: The mitochondria and chloroplasts of Eukaryotic cells arose from the symbiotic incorporation of prokaryotic cells by a proto-eukaryotic cell.ukaryotic cells originated more than 0.6 billion years ago. The mitochondria (and plastids) of extant eukaryotic cells are remarkably similar suggesting aerobic bacteria (or cyanobacteria) were incorporated on only one occasion each.