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Leaving certificate biology

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  1. Ecology theory
    5 Topics
    |
    1 Quiz
  2. Unit 1
    Nutrient recycling
    4 Topics
    |
    1 Quiz
  3. Ecological relationships and population dynamics
    2 Topics
  4. Human impact on the ecosystem
    2 Topics
  5. Study of a grassland ecosystem
    3 Topics
  6. Responses in the Flowering Plant
    4 Topics
    |
    1 Quiz
  7. Unit 3
    Sexual reproduction in the flowering plant
    1 Topic
  8. The human reproductive system
    3 Topics
  9. The menstrual cycle
    2 Topics
  10. Pregnancy
    2 Topics
  11. The circulatory system
    4 Topics
  12. Blood
    5 Topics
  13. The heart
    5 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