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Viruses & Bacteria Biology 20 This Powerpoint is hosted on Please visit for 1000+ free powerpoints.
Viruses & Bacteria Chapter 20 Biology. What are Viruses A virus is a non-cellular particle made up of genetic material and protein that can invade living.
Viruses & Bacteria. What are Viruses A virus is a non-cellular particle made up of genetic material and protein that can invade living cells.