What is contributed from the outer space in an ecosystem?
Correct answer: D. Energy only
- A. All the atmospheric gases
- B. Only carbon, hydrogen and oxygen
- C. All the above components
- D. Energy only
Explanation
The main contribution from outer space to an ecosystem is solar energy, which powers photosynthesis and therefore most ecosystem food chains. Atmospheric gases and chemical elements are supplied mainly through Earth’s own cycles.
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