It's an sight observation you're using your eyes to see it it's one of your 5th sences
6CO2 + 6H2O --> C6H12O6 + 6O2
carbon dioxide + water --> glucose + oxygen
The arrow indicates sunlight (energy).
:)
I only have one reason but hope it helps!
Because without those bases pairing there <span>would be no structure of a DNA.</span>
Because there is a reflection from the sun hits the moon the moon reflects the light on earth
