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| in biology, the smallest unit that can perform all life processes; cells are covered by a membrane and have DNA and cytoplasm. |
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| a phospholipid layer that covers a cell's surface; acts as a barrier between the inside of a cell and the cell's environment. |
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| one of the small bodies in a cell's cytoplasm that are specialized to perform a specific function. |
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| in a eukaryotic cell, a membrane-bound organelle that contains the cell's DNA and that has a role in processes such as growth, metabolism, and reproduction. |
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| an organism that consists of a single cell that does not have a nucleus |
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| an organism made up of cells that have a nucleus enclosed by a membrane; eukaryotes include animals, plants, and fungi, but not archaea or bacteria |
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