More Lessons for Biology
Notes, summary images, and videos for students revising IGCSE Biology Extended are provided below.
Describe the characteristics of living organisms by defining the following terms:
- 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 or sense stimuli in the internal or external environment and to make appropriate responses
- Growth: A permanent increase in size and dry mass by an increase in cell number or cell size or both
- Reproduction: The processes that make more of the same type of organism
- Excretion: Removal from organisms of the waste products of metabolism (chemical reactions in cells including respiration), toxic materials, and substances in excess of requirements
- Nutrition: Taking in of materials for energy, growth and development; plants require light, carbon dioxide, water and ions; animals need organic compounds and ions and usually need water
Mmemonic: MRS GREN
The following diagram shows the characteristics of living organisms and provides examples.
Characteristics of Living Organisms - MRS GREN
This video describes the characteristics of living organisms and provides examples.
Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.
You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.
We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.