Bacteria and other prokaryotes are found deep underground inwater and in the air. One micron (106 m) is a typical length scale associated with thesemicrobes. a) Estimate the total number of bacteria and other prokaryotesin Earth's biosphere. b) Estimate total mass of all such microbes. Bacteria and other prokaryotes are found deep underground inwater and in the air. One micron (106 m) is a typical length scale associated with thesemicrobes. a) Estimate the total number of bacteria and other prokaryotesin Earth's biosphere. b) Estimate total mass of all such microbes.