Ventilation is the process by which air moves in and out of the lungs.Diffusion is the spontaneous movement of gases, without the use of any energy or effort by the body, between the gas in the alveoli and the blood in the capillaries in the lungs.
The history of life on Earth began about 3.8 billion years agohumans have been around for a mere 0.004% of the Earth's history
Answer:
this is my lazy guess but: human activity, differences in emitted energy from earth, and natural fluctuations. BUT DONT TRUST ME LOOK IT UP IM NOT SMART
<span>A) Converting glucose to carbon dioxide and water</span>
