A plus water plus light with a right-pointing arrow towards B plus oxygen. The arrow has an x above it.
What is the role of substance A in photosynthesis?
It traps light energy from the atmosphere.
It combines with water to form glucose.
It cools the atmosphere by changing into vapor.
It changes into hydrogen in the presence of light.
1 answer
In photosynthesis, substance A is typically carbon dioxide (CO₂). The correct role of carbon dioxide in photosynthesis is that it combines with water to form glucose, alongside the energy derived from light. Therefore, the answer to your question would be:
It combines with water to form glucose.
