Unit 3 Lesson 1 The Characteristics of Cells VOCABULARY

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hairlike structures that help some prokaryotic cells move

the smallest functional and structural unit of all living things; the basic unit of life

an organism made up of cells that have genetic material in a nucleus and membrane-bound organelles, as well as ribosomes

an organism made up of just one cell and must carry out all of the life functions itself

the region of the cell within the membrane that includes gel-like fluid, the cytoskeleton, and all of the organelles except the nucleus

an organism made up of more than one cell; cell in this type of organism often have specialized functions

a small body in a cell's cytoplasm that is specialized to perform a specific function

(1) a protective layer that covers a cell's surface and acts as a barrier between the inside of the cell and the cell's environment (2) controls the movement of materials into and out of the cell