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Questions and Answers
Define respiration in living organisms.
Define respiration in living organisms.
Respiration is the chemical reactions that break down nutrient molecules in living cells to release energy.
Explain the process of growth in living organisms.
Explain the process of growth in living organisms.
Growth is a permanent increase in size and dry mass by an increase in cell number or cell size or both.
What is sensitivity in the context of living organisms?
What is sensitivity in the context of living organisms?
Sensitivity is the ability to detect or sense stimuli in the internal or external environment and make appropriate responses.
Describe the role of excretion in living organisms.
Describe the role of excretion in living organisms.
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Explain the importance of nutrition for living organisms.
Explain the importance of nutrition for living organisms.
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What is reproduction in the context of living organisms?
What is reproduction in the context of living organisms?
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What are the seven characteristics of living organisms according to the mnemonic MRS.H.GREN?
What are the seven characteristics of living organisms according to the mnemonic MRS.H.GREN?
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What are the essential requirements for plant nutrition?
What are the essential requirements for plant nutrition?
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What are the essential requirements for animal nutrition?
What are the essential requirements for animal nutrition?
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How is a species defined?
How is a species defined?
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What is the binomial system of classification used for?
What is the binomial system of classification used for?
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What are the two parts that make up the scientific name of an organism in the binomial system?
What are the two parts that make up the scientific name of an organism in the binomial system?
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Study Notes
Characteristics of Living Organisms
- Respiration is the process by which living organisms convert glucose into energy, releasing carbon dioxide and water as byproducts.
- Growth is the permanent increase in size and mass of an organism, resulting from an increase in the number of cells, cell size, or both.
Sensitivity and Excretion
- Sensitivity is the ability of an organism to detect and respond to stimuli from its environment.
- Excretion is the process by which living organisms remove waste products from their bodies, preventing the buildup of toxins.
Nutrition
- Nutrition is the process by which living organisms obtain energy and nutrients from their environment.
- Nutrition is essential for living organisms to grow, maintain their structures, and respond to stimuli.
Reproduction
- Reproduction is the process by which living organisms produce offspring, ensuring the continuation of their species.
Characteristics of Living Organisms (MRS.H.GREN)
- Seven characteristics of living organisms: Movement, Respiration, Sensitivity, Hunger (nutrition), Growth, Reproduction, Excretion, and Nutrition.
Plant and Animal Nutrition
- Essential requirements for plant nutrition: light, water, carbon dioxide, and minerals.
- Essential requirements for animal nutrition: carbohydrates, proteins, fats, vitamins, minerals, and water.
Classification and Taxonomy
- A species is a group of living organisms that can interbreed to produce fertile offspring.
- The binomial system of classification uses a two-part name to identify each species, consisting of a genus name and a species name (e.g., Homo sapiens).
- The binomial system is used to universally identify and classify living organisms.
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Description
Prepare for your CIE IGCSE Biology exam with these revision notes covering the characteristics and classification of living organisms. Topics include movement, respiration, and sensitivity. Get ready with past papers and topic questions from Save My Exams.
