Reproduction. All living things die after a life span that varies from one species to another. For this reason living members of a species must give rise to new individuals to serve for the continued existence of the species.
Growth and development. Growth is the permanent increase in size and weight of an organism.
Nutrition. For living organisms to grow and carry out the various life processes, they require a source of food.
Respiration. To carry out the various life processes, living things require energy. the energy is released when food materials are broken down
Excretion. Processes that take place in living organisms lead to formation of waste products that must be removed from the body.
Irritability. The ability to detect and respond to changes constitutes irritability.
