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a collection of similar cells that have the same origin.
a serious eating disorder in which sufferers starve themselves voluntarily owing to extreme...
is the supply of materials, in the form of food, required by organisms and cells to stay alive...
organisms, such as plants, which are able to produce their own organic foodstuffs from inorganic...
an international agreement to phase out the use of CFCs, signed by 49 countries in Montreal,...
a rubbery, protein-carbohydrate complex that forms the matrix of cartilage.