Question

c6h12o6 + 6o2 → 6h2o + 6co2
glucose is broken down during cellular respiration to produce carbon dioxide and -
a ammonia.
b sucrose.
c oxygen gas.
d water vapor.

Explanation:

Cellular respiration breaks down glucose in the presence of oxygen to produce carbon dioxide and water. The chemical equation shows water ($H_2O$) is produced, which in the context of respiration can be in vapor form.

Answer:

D. water vapor