Size of bacteria Average bacteria 0.5-2.0 um in(-microsope) RBC is 7.5 um in diam Surface area to volume is 3: 1 ypical Eukaryote Cell SA vs Vol is 0. 3: 1 Nutrition enters through SA, quickly reaches all parts of bacteria Eukaroytes need structures organelles Light microscope: Bright -field microscope 100xobjective lens Phased contrast microscope 10x ocular lens Dark-field microscope Fluorescence microscope Electron microscope Bacteria are transparent Scan electron microscope Confocal microscope Chapter 2, p. 9Size of Bacteria  Average bacteria 0.5 - 2.0 um in (- microsope) -- RBC is 7.5 um in diam.  Surface Area to Volume is 3:1 -- Typical Eukaryote Cell SA vs Vol is 0.3:1  Nutrition enters through SA, quickly reaches all parts of bacteria -- Eukaroytes need structures & organelles Light microscope: Bright –field microscope 100xobjective lens Phased contrast microscope 10x ocular lens Dark-field microscope Fluorescence microscope Electron microscope Scan electron microscope Confocal microscope Bacteria are transparent Chapter 2, p. 9