4. nitrogen gas is more abundant in our atmosphere than
oxyganl however, nitrogen needs to be converted into
different forms to be used by many organlams. bacteria ara
highly involved in thisl describe the role of (a) bacteris
fixing nitrogen as they liva symblotically with some plant
species, (b) nitrifying bacteria, and (c) denitrifying bacteria
in the nitrogen cycle."

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.