The answer is 120! good luck
The answer is; NO
This is because the leaf would not have tiny oxygen bubbles spread across its base (because the base is where most stomata are) that would help it float on the water. The reason is that the oxygen produced in the process of photosynthesis would be consumed in respiration because the rates of the two biochemical processes are the same.
That the pace of everyday life is such that is prevents individuals from perceiving that which the society deemed as unimportant.
Nope, because they serve no purpose on earth