Study Biology notes on Characteristics of Living Organisms for Secondary. Useful for revision, homework, and exam preparation in Zimbabwe.
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Characteristics of Living Organisms In order to identify living organisms, scientists listed 7 characteristics which all living organisms have: 1. Nutrition - Taking in nutrients which are organic substances and mineral ions, containing raw materials and energy for growth and tissue repair, absorbing and assimilating them. 2. Excretion - Removal from organisms of toxic materials, the waste products of metabolism and substances in excess. 3. Respiration - Chemical reactions that break down nutrient molecules in living cells to release energy. 4. Sensitivity - The ability to detect or sense changes in the environment and to make responses. 5. Reproduction - Progresses that make more of the same kind of organism. 6. Growth - The permanent increase in size and dry mass by an increase in number of cells, cell size, or both. 7. Movement - An action by an organism or part of an organism that changes position or place. The seven characteristics could be memorized by the term "Mrs. Gren": 1| Page