Download Cell Discovery and Theory

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
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1800s, Scientists discover that plants and animals have
cells and are created by preexisting cells.
Principles:
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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.
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Basic Cell Types
ALL cells have a plasma membrane
Two categories of cells:
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Prokaryotic (pro kar ee AW tik)
Eukaryotic (yew kar ee Aw tik)
Eukaryotic Characteristics
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contain organelles and a nucleus
Prokaryotic Characteristics
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cells without a nucleus and/or organelles