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What Is Life (The Characteristics of Living Things (Chemicals of life…

- - - - Organisms use food for energy, all living things need food.
        
        Water
        
        As well as food, all living things also need water. Most organisms can only live a few days without water.
        
        Living space
        
        All organisms need a place to get food and water, so they fight for space.
- - - - In a controlled experience, a scientist carries out two tests that are identical except for one factor. The factor the scientist changes is called the manipulated variable
        
        Pasteur's Experiment
        
        Louis demonstrated that new bacteria appeared in broth only when they were produced by older bacteria