Chapter 7 Section 1

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Biology

9th

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10 Terms

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Cell
Basic unit of structure and organization of all living organisms.
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Cell Theory
The theory that states all organisms are made of one or more cells, cells are the basic unit of life, and all cells come from other cells.
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Plasma Membrane
flexible, selectively permeable boundary that helps control what enters and leaves the cell
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Organelle
specialized internal cell structure that carries out specific cell functions such as protein synthesis and energy transformation
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Eukaryotic Cells
unicellular organism with membrane-bound nucleus and organelles; generally larger and more complex than a prokaryotic cell
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Nucleus
in eukaryotic cells, the central membrane-bound organelle that manages cellular functions and contains DNA
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Prokaryotic Cell
microscopic, unicellular organism without a nucleus or other membrane-bound organelles
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Microscope
device that produces magnified images of structures that are too small to see with the unaided eye
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Electron microscope
microscope that forms an image by focusing beams of electrons onto a specimen
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Compound light microscope
microscope that allows light to pass through a specimen and uses two lenses to form an image