cell discovery and theory 7.1. history o’ microscope first magnifier created by using curved glass...
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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
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