DeShawn is studying homeostasis and circulation. To organize his findings, he constructs two models of the human heart, veins, and arteries: one to represent a non-smoker, and one that includes attributes typically found in a smoker. By comparing the two models, which relationship of cause and effect can DeShawn best explain?

During an experiment, readings for blood pressure in a persons body were found to be constant . however , when he measured by a different blood pressure cuff , the readings differed by 15 points for each reading. this difference indicates that the results are

A(n) is a molecule influences the way that a molecule reacts.

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.