IGCSE Biology 0610
1.1 Characteristics of living organisms
We can use the acronym MRS GREN
- Movement – an action by an organism or part of an organism causing a change of position or place
- Respiration – the chemical reactions in cells that break down nutrient molecules and release energy for metabolism
- Sensitivity – the ability to detect and respond to changes in the internal or external environment
- Growth – a permanent increase in size and dry mass
- Reproduction – the processes that make more of the same kind of organism
- Excretion – the removal of the waste products of metabolism and substances in excess of requirements
- Nutrition – the taking in of materials for energy, growth and development