If there are respiring organisms within that sample of air, the partial pressure of oxygen decreases because the organisms utilize it for respiration activities.
Answer:
the answer, you can select it and write it down
C ........................i think
Answer:
Both plants and animals use this molecule to create energy, making it essential to life on Earth. ... To create one molecule of glucose, the plant needs to absorb six molecules of carbon dioxide and six molecules of water. This leaves six oxygen atoms free, which are released as waste.