The only independent variable in this experiment is the amount of nitrogen Sarah uses. All of the other variables are dependent on other factor and processes, but Sarah controls the amount of nitrogen that she uses for each plant.
Answer: As a product
Explanation:
It acts as a product, the glucose bonds are broken apart – releasing the chemical energy stored in it. Cellular respiration uses glucose and oxygen, and it makes water and carbon dioxide
By the excretory system through the large intestine
