Energy and nutrients flow from one trophic level to another in an ecosystem. Which one of the following statements <strong>correctly</strong> describes the direction of flow of energy and nutrients in an ecosystem?
- A. Energy flow is cyclic and nutrient flow is unidirectional.
- B. Energy flow is unidirectional and nutrient flow is cyclic. ✓
- C. Both energy and nutrient flow are unidirectional.
- D. Both energy and nutrient flow are cyclic.
Correct Answer: B. Energy flow is unidirectional and nutrient flow is cyclic.
Explanation
In an ecosystem, energy flows unidirectionally from producers to consumers and is lost as heat, while nutrients are constantly recycled (cyclic flow) through biogeochemical cycles.
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