How when you breath air goes to your lungs but when you eat it goes to tour stomach

Although there are a limited number of amino acids many different types of proteins exist because..

One of the newest applications of cell technology is called cybrid embryos. this process involves replacing the nuclear material of an animal cell with human nuclear material. how might this process affect public policies about research by using stem cells? the same policies and concerns about the use of human embryonic stem cells would most likely apply. the embryos would most likely be treated like traditional animal embryos and regulated accordingly. the process of forming cybrid embryos would most likely be banned by government regulators. the embryos would be treated as regular cells because they are not fully human in origin.

About how many years does it take for one cycle of surface water to become deep water and then surface water again in the oceans? 101001,000