Plz answer I will mark u as Carla drew a diagram to compare the roles of oxygen and hydrogen in photosynthesis. Which label belongs in the area marked Y? Enters plant as a part of water Combines with carbon dioxide Is released into air through stomata Is stored in leaves for later use

Option A, Enters plant as part of water

Explanation:

In the process of photosynthesis, water molecule is broken down into oxygen and hydrogen through photolysis.

Once the molecule is broken down , oxygen is  released and hydrogen ion are used for initiating the further reactions in photosynthesis.

The following reaction occurs in photolysis-

2H2O > 4H+ + O2

Water is the most suitable subset among all.

Hence, option A is correct

Not sure, but a good chance that it is released into air through stomata

Explanation:

You need to add a picture or something to make it clearer.

a polymer is a chainlike molecule made up of small molecular units. these small molecular units are called monomers. monomers of polymer can be joined together either naturally or synthetically.  

helicase, i think thats it