21.   It is one of several varieties of biotech corn that contains a bacterium gene that makes the plant toxic to the European corn borer.

22.   Large seed companies and firms that were licensed to sell the biotech corn were not eligible for the program.

23.   Purchasers in South Korea, another major U.S. market, have expressed concerns, too, about the biotech corn known as StarLink.

24.   Seed companies began testing for the biotech corn in other varieties and found traces of the grain.

25.   Several varieties of biotech corn and soybeans are approved for food use and are found in processed products throughout stores.

26.   Safeway Inc. removed taco shells from its stores Wednesday night after learning of test results that showed they may contain the biotech corn.

27.   StarLink is one of several varieties of biotech corn that contain a bacterium gene that allows the plant to make its own pesticide.

28.   StarLink is one of the least used varieties of biotech corn and the only one not allowed in food.

29.   South Korea and a U.S. food processor are disputing whether tortillas were shipped to the Asian country that may contain an unapproved variety of biotech corn.

30.   StarLink is one of the least-used varieties of biotech corn and the only one not allowed in food.