1(a)(i) List three characteristics of living organisms. (ii) Explain briefly the characteristics listed in 1(a)(i) above
1(a)(i) Characteristics of Living Organisms: Movement/Locomotion, Excretion, Respiration, Reproduction, Irritability/Sensitivity/Response, Growth/Development, Nutrition/Feeding, Competition, Adaptation
(ii) MOVEMENT: Living things change position of the whole body/parts of the body, from one place to another in search of food/shelter/mates etc. EXCRETION: involves the removal/getting rid of waste products of cell metabolism, metabolic waste are poisonous if allowed to accumulate. RESPIRATION: This is the breakdown/burning of food substance, by aerobic/anaerobic respiration, to release energy need for all processes of life. REPRODUCTION: This is the ability of living organisms to produce new individual of their own kind, this ensures the continuity of the species of organisms. IRRITABILITY: Response/reaction of organism, towards change in the environment to ensure survival. NUTRITION: the process involved in obtaining/manufacturing food, can be autotrophic/heterotrophic and utilizing it for growth and maintenance/life process. GROWTH: This is the irreversible increase in size and weight of an organism which leads to complexity and maturation. COMPETITION: Ability of organism to struggle for all necessity of life, to survive in their environment. ADAPTATION: Ability of organisms to adjust to change in environment for survival. LIFESPAN/DEATH: All living organisms have definite period of existence, all organisms die.