BIOL150 Lecture Notes - Lecture 1: Nuclear Membrane
14 Dec 2015
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First microscope o: viewed slices of cork cellula (little rooms) Reported that the cork was composed of a mass of minute chambered, which he called cells . They were actually left over cell walls that remained after the living plant cells inside them had died. Antoni van leeuwenhoek 1632-1723: worked with glass o. Limited resolving power o: emphasis on description rather than explanation. Improved magnification and resolution o: allowed visualization of objects less than 1 m. 1822 robert brown (botanist: noticed that every plant cells contained a round structure. 1838 matthias schleiden (botanist: all plant tissues are composed of cells, embryonic plants always arose from a single cell, similar observations in animal cells. Recognition of structural similarities between plants and animals. All organisms consist of one or more cells. The cell is the basic unit of structure for all organisms (added 20 years later) all cells arise from pre-existing cells. Use inductive reasoning to develop a tentative explanation (hypothesis)
