Chapter 7 Section 1

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Cell

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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

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