The evolution of C4 photosynthetic system is probably one of the strategies for:

1. maximizing the availability of oxygen in spite of continuing high amount of water loss
2. maximizing availability of water in spite of continuing high amount of carbon dioxide loss
3. reducing the amount of water loss but leads to decreased availability of carbon dioxide
4. maximizing the availability of carbon dioxide while minimizing water loss
Subtopic:  Transpiration & Guttation | Photosynthesis Transpiration Compromise & Mineral Translocation |
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