Unit 3 Lesson 1

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Cell

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In biology, the smallest unit that can perform all life processes; covered by a membrane and contain DNA and cytoplasm.

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Organism

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A living thing; anything that can carry out life processes independently.

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Cell Membrane

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A phospholipid layer that covers a cell's surface and acts as a barrier between the inside of a cell and the cell's environment.

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Nucleus

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Membrane bound organelle found in Eukaryotes that contains DNA and controls cell functions.

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Prokaryote

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A single-celled organism that does not have a nucleus or membrane-bound organelles; examples are archaea and bacteria.

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Eukaryote

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An organism made up of cells that have a nucleus enclosed by a membrane; includes protists, animals, plants, and fungi but not archaea or bacteria.

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Cytoplasm

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

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Organelle

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One of the small bodies in a cell's cytoplasm that are specialized to perform a specific function