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13 Pages • Topic Notes • Year: Pre-2021
1. Organismsaremadeofcellsthathavesimilarstructuralcharacteristics 1.1 Outline the historical development of the cell theory, in particular, the contributions of Robert Hooke and Robert Brown. Before the invention of lenses and microscopes it was believed that living matter could come from non-living matter, such as maggots coming from dead things. Malpighi (1628-1694) – first to use lenses to magnify things Leeuwenhoek (1632-1723) – constructed microscope better than others at the time; discovered microbes in rainwater; discovered yeast cells, bacteria and protozoa. Hooke (1635-1703) – designed a compound microscope (more than one lens) to observe cells in cork. Was first person to use word ‘cell’. Brown (1773 – 1858) – recognised nucleus as regular feature in all plant cells and named it. Flemming, in 1880, described cell division (mitosis) from his observations on living and stained cells. Statement
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