"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.
For giving you understanding ; we need Free O2 but Oxygen is also available in H20 right why dont we use it !!
As the early atmosphere was reducing as there was no free oxygen but it was later produced by chemoautotrophic bacteria !! Living thing release O2 in atmosphere thus making it oxidising in nature and then life evolves !!
They are found in the body
Skin maintains homeostasis by regulating your body temperature. <span />
The answer cannot be b, because that would be volume. It also cannot be c because that would be mass, which leaves the answer to be a, the amount of matter that makes an object.
