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Leaving certificate biology
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Unit 1Ecology theory5 Topics|1 Quiz
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Nutrient recycling4 Topics|1 Quiz
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Ecological relationships and population dynamics2 Topics
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Human impact on the ecosystem2 Topics
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Study of a grassland ecosystem3 Topics
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Responses in the Flowering Plant4 Topics|1 Quiz
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Unit 3Sexual reproduction in the flowering plant1 Topic
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The human reproductive system3 Topics
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The menstrual cycle2 Topics
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Pregnancy2 Topics
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The circulatory system4 Topics
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Blood5 Topics
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The heart5 Topics
Lesson 2, Topic 1
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Nutrient recycling
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What is nutrient recycling ?
- Nutrient recycling is the movement of essential elements from the abiotic environment into living organisms, and then returning to the abiotic environment to be used again
Why is nutrient recycling important ?
- Nutrient recycling ensures that nutrients are never depleted but are reused again and again
How are nutrients returned to the environment?
Nutrient are returned to the environment by:
- Respiration
- Excretion
- Egestion
- Decomposition by microorganisms
