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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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| 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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| a cell organelle composed of RNA and protein; the site of protein synthesis |
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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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| an organism made up of cells that have a nucleus enclosed by a membrane, multiple chromosomes, and a mitotic cycle; eukaryotes include protists, animals, plants, and fungi but not archaea or bacteria |
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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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| one of the small bodies that are found in the cytoplasm of a cell and that are specialized to perform a specific function |
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| a small cavity or sac that contains materials in a eukaryotic cell; forms when part of the cell membrane surrounds the materials to be taken into the cell or transported within the cell |
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| a system of membranes that is found in a cell's cytoplasm and that assists in the production, processing, and transport of proteins and in the production of lipids |
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| a cell organelle that helps make and package materials to be transported out of the cell |
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| a fluid-filled vesicle found in the cytoplasm of plant cells or protists |
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| an organelle found in plant and algae cells where photosynthesis occurs |
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| in eukaryotic cells, the cell organelle that is surrounded by two membranes and that is the site of cellular respiration, which produces ATP |
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| a long, hairlike structure that grows out of a cell and enables the cell to move |
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| a group of similar cells that perform a common function |
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| a collection of tissues that carry out a specialized function of the body |
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| a group of organs that work together to perform body functions |
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| a collection of genetically identical cells that are permanently associated but in which little or no integration of cell activities occurs |
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