Question

Carla drew a diagram to compare the roles of oxygen and hydrogen in photosynthesis.

Which label belongs in the area marked Y?

A-Enters plant as part of water
B-Combines with carbon dioxide
C-Is released into air through stomata
D-Is stored in leaves for later use

Answer 1

A. Enters plant as a part of water

Answer 2

Answer:

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

The image in the question shows a subset that has both hydrogen and oxygen. Therefore, water is the most suitable subset among all.

Hence, option A is correct