MONSANTO <MTC> INVESTS IN BIOTECHNOLOGY <BIOD> Biotechnology Development Corp said its Medicontrol Corp subsidiary received a 500,000 dlr investment by Monsanto Co's G.D. Searle and Co subsidiary. The company said the investment was made pursuant to an option Searle held, and increases Searle's stake in Medicontrol to 19.8 pct with a total investment of one mln dlrs.