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Class 10 – Science | Biology 1. What Are Life Processes? All living organisms — whether plants, animals, or microbes — perform certain basic activities to stay alive. These activities are called life processes . They help the body maintain itself, grow, reproduce, and respond to changes in the environment. The main life processes are: Nutrition Respiration Transportation Excretion In some cases, Reproduction and Movement  are also considered life processes. In this chapter, w