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CP Vocab for 7.1 and 7.2

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Term
Definition
Cell   Basic unit of all forms of life.  
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Cell Theory   Fundamental concept of biology that states all living things are composed of cells; that cells are the basic units of structure and function in living things; and that new cells are produced from existing cell.  
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Cell Membrane   Thin, flexible barrier that surrounds all cells; regulates what enters and leaves the cell.  
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Nucleus   The center of an atom, which contains the protons and neutrons; in cells, structure that contains the cell's genetic material in the form of DNA.  
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Eukaryote   Organism whose cells contain a nucleus.  
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Prokaryote   Unicellular organism that lacks a nucleus.  
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Cytoplasm   In eukaryotic cells, all cellular contents outside the nucleus, in prokaryotic cells, all of the cell's contents.  
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Organelle   Specialized structure that performs important cellular functions within a cell.  
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Vacuole   Cell organelle that stores materials such as water, salts, proteins, and carbohydrates.  
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Lysosome   Cell organism that breaks down lipids, carbohydrates, and proteins into smaller molecules that can be used by the rest of the cell.  
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Cytoskeleton   Network of protein filaments in a eukaryotic cell that gives the cell its shape and internal organization and is involved in movement.  
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Centriole   Structure in an animal cell that helps to organize cell division.  
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Ribosome   Cell organelle consisting of RNA and protein found throughout the cytoplasm in a cell, the site of protein synthesis.  
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Endoplasmic Reticulum (ER)   Internal membrane system found in eukaryotic cells; place where lipid components of the cell membrane are assembled.  
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Golgi Apparatus   Organelle in cells that modifies, sorts, and packages proteins and other materials from the endoplasmic reticulum for storage in the cell or release outside the cell.  
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Chloroplast   Organelle found in cells of plants and some other organisms that captures the energy from sunlight and converts it into chemical energy.  
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Cell Wall   Strong, supporting layer around the cell membrane in some cells.  
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Selectively Permeable   Property of biological membranes that allows some substances to pass across it while others cannot; also called semipermeable membrane.  
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Mitochondria   Cell organelle that converts the chemical energy stored in food into compounds that are more convenient for the cell to use.  
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