1) All living things are made of _________. a) tissue b) cells c) organs 2) A group of cells work together to form ____________. a) tissues b) organs c) specialized cells 3) Specialized cells ___________________. a) perform a specific job b) are only found in muscles c) have nothing to do with organs 4) Tissues work together to make up an __________________. a) organ system b) tissue c) organ

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