Answer:
Plants using glucose to make ATP molecules during the process of photosynthesis which results in the plant releasing oxygen.
This is cellular respiration. ↑
No! That’s why they’re called theories. Most of them have a lot of facts to back it up however the theories themselves are either proven or just hypothetical.
PV = nRT. Where P = pressure, V = volume, n = number of moles, R = universal gas constant and T = temperature. Hope this helps!