Question

Where do plants obtain the oxygen necessary to utilize foods? directly from products of photosynthesis from the splitting of water molecules from the atmosphere from the decomposition of glucose

Answer 1

Answer:

from the splitting of water molecule.

Explanation:

The splitting of water molecules  by sunlight is called Photolysis. This is the first reaction in photosynthesis; which occurs by catalysis  of enzymes of Photo system 11.

It involves the splitting of water molecules into;

hydrogen ion/protons.

Oxygen

and electron.

Oxygen is  the by product liberated into the atmosphere, for animals to inhale for the process of cellular respiration.This is the source of oxygen fro cellular respiration in animals.

the hydrogen ions combined with electrons from photosystem 1 to reduce NADP .The latter is used to reduce C02  to form carbohydrate in light independent reaction