Cell Discovery and Theory 7.1. History o’ Microscope First magnifier created by using curved glass...
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Transcript of Cell Discovery and Theory 7.1. History o’ Microscope First magnifier created by using curved glass...
Cell Discovery and Theory
7.1
History o’ Microscope
•First magnifier created by using curved glass
•1590- Compound Microscope created
•Cells discovered
•1940s- Electron Microscope invented
•3d Images created
Cell Theory• 1800s, Scientists discover that plants and
animals have cells and are created by preexisting cells.
• Principles:
• All living organisms are composed of one or more cells.
• Cells are the basic unit of structure and organization of all living organisms.
• Cells arise only from previously existing cells, with cells passing copies of their genetic material on to their daughter cells.
Basic Cell Types• ALL cells have a plasma membrane
• Two categories of cells:
• Prokaryotic (pro kar ee AW tik)
• Eukaryotic (yew kar ee Aw tik)
• Eukaryotic Characteristics
• contain organelles and a nucleus
• Prokaryotic Characteristics
• cells without a nucleus and/or organelles