Its because... um i haven't done this in a long time.
Answer:
"Glucose is used as food by the plant and oxygen is a by-product. Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by- products and ATP is energy that is transformed from the process."
It is the dependent variable.
<span>Rana sylvatica.
Hope this helps!
-Payshence xoxo</span>
