Environmental changes that cause extinction occur on what time scale? O They are instantaneous.
O They can occur over shorter or longer time scales.
O They are always on the scale of hundreds or thousands of years.
O They are usually on the scale of a few years.

One gene can influence trait(s). one trait can be determined by gene(s).

Which statement best describes how the nucleus, the rough endoplasmic reticulum, and ribosomes interact during protein synthesis?

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.