A, c, and d are the answers
It’s not b because trees release oxygen and absorb carbon dioxide
D. Testable, because a hypothesis is only a persons guess
Answer: the answer is either D or B
Explanation:
Respiration is a process that involves the exchange of
oxygen (O2) and carbon dioxide (CO2) in the lungs between the atmosphere and
pulmonary circulation.Thus, cellular respiration is a process where glucose is converted
into energy in the presence of oxygen while pulmonary respiration occur during
inspiration, it is a process whereby oxygen and carbon dioxide enter and leaves
alveoli simultaneously.
