List three characteristics of living organisms.

(a)(i) List three characteristics of living organisms.

(ii) Explain briefly the characteristics listed in 1(a)(i) above

Answer:

  • Movement/Locomotion : 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 : This involves the removal/getting rid of waste products of cell metabolism, metabolic waste are poisonous if allowed to accumulate.
  • Respiration : This is the breakdown of food substances by aerobic or 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 organism.
  • Irritability/Sensitivity/Response : Response or reaction of organism towards change in the environment, to ensure survival.
  • Growth/Development : This is the irreversible increase in size and weight of an organism which leads to complexity and maturation.
  • Nutrition/Feeding : The process involve in obtaining or manufacturing of food. It can be autotrophic or heterotrophic and utilizing it for growth and maintenance/life process.
  • Competition : Ability of organisms to struggle for all necessity of life, to survive in their environment.
  • Adaptation : is the ability of an organism to adjust to change in environment for survival.
  • Life Span/Death : All living organisms have definite period of existence, all organisms die.

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