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chapter 4@5
Term | Definition |
---|---|
cell | in biology, the smallest unit that can perform all life processes; cells are covered by a membrane and contain DNA and cytoplasm |
cell theory | a concept that states that all living things are made up of cells, that cells are the basic units of organisms, that each cell in a multicellular organism has a specific job, and that cells come only from existing cells |
plasma membrane | or cell membrane, acts as a barrier between the inside and outside of the cell |
cytoplasm | the region of the cell within the membrane that includes the fluid, the cytoskeleton, and all of the organelles except the nucleus |