Living Environment- Unit 1 Characteristics of life All living things are made of - The cell is the basic unit of - All living things use energy to maintain life- All living things maintain a stable internal environment- All living things maintain various chemical reactions- - All living things may pass hereditary information to new organisms- - All living things are diverse and may be grouped -

Chemical Composition All living things are made of 4 main elements: Organic molecules contain both – 3. Organic molecules include: 4. Inorganic molecules – Examples: Salts, Minerals, Acids, Bases,

Organization of an Organism Unicellular- one celled organism - Multicellular- made of - Tissue- a group of similar cells - Organ- made of tissue to - Organ system- a group of organs working together to perform – Organism- a group of organ systems working - Life Functions- nutrition, excretion, respiration-