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9 Cards in this Set

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7.1

organization
the orderly structure of cells in an organism
7.1

cell
the basic units of living organisms
7.1

compound light microscope
instrument that uses light and a series of lenses to magnify objects in steps; can magnify an object up to 1500 times its original size
7.1

cell theory
the theory that (1) all organisms are composed of one or more cells, (2) the cell is the basic unit of structure and organization of organisms, (3) all cells come from prexisting cells
7.1

electron microscope
instrument that uses a beam of electrons instead of light to magnify structures up to 500,000 times actual size; allows scientists to see sructures within a cell.
7.1

organelle
small, specialized structures within cells. Many, but not all, are surrounded by membranes
7.1

prokaryote
unicellular organisms, such as bacteria, that do not have membrane-bound organelles
7.1

eukaryote
multicellular organisms made up of eukaryotic cells that contain membrane-bound organelles
7.1

nucleus
the central membrane-bound organelle that manages or controls cellular functions