I think it ( A ) if worngb sorry
They come from the atmosphere, since plants use carbon dioxide to produce carbohydrates :)
Answer: The chemical equation shown represents photosynthesis. Carbon dioxide + A + light ---x---> B + oxygen. What is the role of substance B in photosynthesis? ... It stores chemical energy.
Explanation:
Natural variation provided the phenotypes that natural selection then acted on, over time causing evolution
Answer: B. The stream will have fewer plants growing
Explanation:
