Three children were racing toy cars. they held them at the top of a ramp. when one said, “go,” they all let go. the cars rolled down the ramp and across the finish line. the children timed their cars. the red car finished in four seconds, the white car finished in two seconds, and the blue car finished in six seconds. question: which car rolled the fastest? explain how you know. which car rolled the slowest? explain how you know. if a fourth car was added to the race and came in second, how would you describe its speed?

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.