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Introduction to Biology ________________--study of living things Living things share the following characteristics: made up of units called_________ _____________ based on a universal ___________ code __________ and develop obtain and use materials and ______________ respond to their _____________________ maintain a____________ internal environment _______________ over time Levels of Organization Groups of Cells Tissues, __________ and organ systems _______ --Smallest functional unit of life Molecules---Groups of __________; smallest unit of most chemical compounds
