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| in biology, the smallest unit that can perform all life processes |
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| the theory that states that all living things are made up of one or more 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 |
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| or cell membrane, the cell's outer boundary |
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| the region of the cell within the membrane that includes the fluid, the cytoskeleton, and all the organelles except the nucleus |
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| the soluble portion of the cytoplasm, which includes molecules and small particles, such as ribosomes, but not the organelles covered with membrane |
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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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| a single-celled organism that has no nucleus and has no membrane bound organelles |
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| an organism made up of cells that have a nucleus enclosed by a membrane, multiple chromosomes, and a mitotic cell |
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| one of the small bodies that are found in the cytoplasm of a cells and that are specialized to perform a specific function |
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| a collection of tissues that carry out a specialized function of the body |
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| a collection of specialized cells and cell products that perform a specific function |
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| a group of organs that accomplish related tasks |
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| a double layer of phospholipids that make up plasma and organelle membranes |
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| in an eukaryotic cell, one of the structures in the nucleus that is made up of DNA and protein |
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| the double membrane that surrounds the nucleus of a eukaryotic cell |
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| the part of the eukaryotic nucleus where ribosomal RNA is synthesized |
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| a cell organelle composed of RNA and protein |
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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 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 system of flattened, membranous sacs |
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| a cell organelle that contains digestive enzymes and that buds from the Golgi apparatus |
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| the cytoplasmic network of protein filaments and tubes that plays an essential role in cell movement, shape, and division |
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| one of the small, tubular fibers composed of the protein tubulin that are found in the cytoplasm of eukaryotic cells, that compose the cytoskeleton, and that play a role in cell structure and movement |
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| a fiber found inside eukaryotic cells that is composed mainly of the protein actin and that has a role in cell structure and movement |
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| a hair-like structure arranged in tightly packed rows and projects from the surface of some cells |
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| a long, hair-like structure that grows out of a cell and enables the cell to move |
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| an organelle that is composed of two short microtubules at right angels to each other and that has an active role in mitosis |
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| a rigid structure that surrounds the cell membrane and provides support to the cell |
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| in some protists and in most plant cells, a large, fluid-filled organelle that stores water, enzymes, metabolic wastes, and other materials |
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| an organelle of plant cells that contain specific substances and performs specific functions for the cell |
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| an organelle found in plant and algae cells where photosynthesis occurs |
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| a membrane system found within chloroplasts that contains the components for photosynthesis |
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| a green pigment that is present in most plant cells, that gives plants their characteristic green color, and that reacts with sunlight, carbon dioxide, and water to form carbohydrates |
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