Josiah uses a pencil called Brand A. He has pencil smears on his paper every time he completes an assignment and he hates this! Caleb is using a pencil called Brand B. Josiah notices Caleb never has smears on his paper. Josiah wonders if it's the brand of pencil that's keeping Caleb from getting smears on his paper. He decides to borrow Caleb's pencil and test the brand against his to find out. Hypothesis:

What is another variable that Josiah could test in this situation as a 2nd experiment?

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.