"smallest part of a living thing that can carry out processes of life", "cell" "a thin outer layer of a cell", "cell membrane" "the gel-like material inside the cell that holds all the other inner parts of a cell", "cytoplasm" "a large, round structure at the center of a cell that controls all the activities of a cell", "nucleus" "the part of a cell that breaks down food and turns it into energy for the cell", "mitochondrion" "a cell part that holds food, water, and wastes", "vacuole" "a hard outer layer of a plant cell that protects the cell and provides support", "cell wall" "a part of a plant that uses energy from sunlight to make food", "chloroplast" "an individual living thing that can carry out all its own life activities", "organism" "a group of similar cells that do the same job in an organism", "tissue" "a body part made of different kinds of tissues that work together to do a certain job", "organ" "a group of organs that work together to do a certain job", "organ system" "the highest taxonomic category of organisms in biological classification", "domain" "the broadest group into which living things are classified", "kingdom" "an animal that does not have a backbone", "invertebrate" "an animal that has a backbone", "vertebrate" "any plant that soaks up (absorbs) water from the ground directly into its cells", "nonvascular (plant)" "any plant that has tubes for moving water and other materials to where they are needed", "vascular (plant)" "one-celled living things that do not have a nucleus", "bacteria (prokaryote)" "a one- or many-celled organism that can either make, eat, or absorb food", "protist (eukaryote)"
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