Biology for IGCSE & O level - Plant Nutrition (Section 7 - No. 34)
What is the importance of photosynthesis to most ecosystems?
It provides the oxygen that most organisms need.
It produces the food (glucose) that is the foundation of the food chain.
It removes carbon dioxide from the atmosphere.
All of the above.
Explanation
Photosynthesis is essential for both the air and the energy of the ecosystem.
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