MIMM 211 Lecture Notes - Lecture 1: Lucretius, Protozoa, Microorganism
15 Jun 2016
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Size of organism (cannot be seen by unaided eye < 1mm) Microorganisms are also called microbes ubiquitous in nature (everywhere) live under many harsh environment (hot, cold, high salt, ph) associated to humans (called microbiota) most are innocent to humans some useful (food, biotech) some harmful (pathogens) Found in 3 kingdoms of life: bacteria archaea and eucarya. They are the most common life form on earth. Hooke first description an depiction of microorganism using microscope; reproductive structure: sporangia. Leeuwenhoek discovers bacteria and protozoa, which appeared in certain materials; revive spontaneous generation (sg) Spontaneous generation: spontaneous formation or development of living organisms from inanimate/non-living matters; aristotle, descartes, and newton all believed in this. Needham boiled broth, then put into flask, microorganism grew; support. Spallanzani first put broth into flask, then boiled both. Supporters of sg thought may sg needs air. Pasteur boiled broth and flask, curved neck of flask, so air but no dust can enter.
