BIOL 1002 Chapter : Chapter 19 Prokaryotes And Viruses Outline
Document Summary
Diversity of prokaryotes and viruses chapter 19. *they are in, out, all-around, good, bad, & required. In terms of abundance, prokaryotes rule as earth"s predominant form of life. Life on earth was solely prokaryotic for the first 1. 5 billion years. The prokaryotic domains (bacteria and archaea) were the first organisms and arose on earth (about. While only about 5000 prokaryotic species have been described, there may be as many 500,000- Prokaryotes range in size from 0. 2-1. 0 micrometers (very small) in diameter (however in numbers they are huge) (see fig 19-10). The thickness of a dime is about 1 millimeter (1000 micrometers). *the two domains appear similar in many respects however they are different in some very basic ways. *one main distinction between the bacteria and the archaea is that the cell walls of bacteria contain peptidoglycan (archaea do not). This bacterial cell wall is composed of peptidoglycan.
