Answer:
Biogas is composed mostly of methane (CH4), the same compound in natural gas, and carbon dioxide (CO2).
Explanation:
Perception of pitch and sound intensity is the cocklear
"Lactose intolerance" means that your stomach has an extremely hard time digesting lactose, found in dairy products such as milk. For the second part of the question, can you tell me if you mean adapting to resist against lactose or the development of lactose from a long time ago.
