Edexcel IGCSE Biology

Revision Notes

1.1.1 The Unifying Characteristics of Living Organisms

The Unifying Characteristics of Living Organisms

  • In order for something to be considered ‘living’, it must fulfil specific criteria that are true of all living organisms
  • These criteria can be remembered using the acronym MRS C GREN
    • Movement
    • Respiration
    • Sensitivity
    • Control
    • Growth
    • Reproduction
    • Excretion
    • Nutrition
  • If something does not carry out all of these life processes, it is either dead or non-living
  • Viruses are a good example of non-living particles/agents

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