The on-again/off-again Tyson buy-out of I-B-P is back on track, but Senator Charles Grassley is urging a new Bush Administration official to carefully review the deal. Grassley sent President Bush a letter yesterday on the subject.Grassley says the U-S Justice Department has given agriculture “short shrift” when it comes to reviewing proposed industry mergers as potential monopolies.Chicken giant Tyson proposes buying I-B-P for two-point-seven billion dollars. Senator Grassley is joining other top Republicans in asking President Bush to forbid the use of human embryo “stem-cells” in federally financed medical research. Under Clinton Administration rules, only embryos that were discarded from fertility clinics could be used, but Grassley says that’s still wrong.Grassley says adult stem cells and cells from umbilical cords provide researchers with plenty of alternatives to using embryos.Many scientists believe stem cells from human embryos hold the keys to unlocking cures for illnesses like Alzheimer’s, Parkinson’s and diabetes. SOME abortion opponents have supported the use of embryos that are to be thrown away by fertility clinics, but the three top Republicans in the U-S House yesterday told President Bush “it is not pro-life to rely on an industry of death, even if the intention is to find cures for diseases.”