The Phlogiston theory was accepted until the 18th century, when Lavoisier proved that combustion requires a gas that has mass. Phlogiston is considered A) to be scientific knowledge B) not to be scientific knowledge C) to be proven by scientific method D) to be accepted in the modern scientific community

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.