BI236 Lecture Notes - Lecture 2: Robert Hooke, Archaea, Paramecium
Document Summary
Robert hooke discovered cells in 1665 in cork. Paramecium is found in waters with small hairs around it. Certain cells can be a single cell, these are called microorganisms (bacteria, these can be seen by human eye ^^ archea and yeast/fungi) Seeing cells small cells can be seen through light microscopes (such as structures within cells) the most powerful light microscope can see bacteria but not viruses to see anything smaller than 500nm you need a high power electron microscope. Biologists recognize prokaryote and eukaryote cells simpler type of characteristic of prokaryotes and more complex are plants and animals such as eukaryotes. Main distinction between these two cells are the membrane bound nucleus of the eukaryotic cells: cells with a true nucleus have a membrane bound nucleus. Three domains scientists now recognize three domains achaea, bacteria and eukarya (eukaryotes) prokaryotes-domain archaea.
