The climate and features of the Earth change over time.

What makes it possible for some kinds of organisms to survive these changes?

A.
During their lifetimes, those kinds of organisms are able to change into very different species (kinds) of organisms.
B.
Some kinds of organisms are able to cause changes in the climate where they live.
C.
Over many generations, the characteristics of those kinds of organisms also change.
D.
The characteristics of those kinds of organisms always stay the same.

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.