Prior to Recombinant DNA Technologies, the Major Difficulty with Using

Multiple Choice

Prior to recombinant DNA technologies, the major difficulty with using the herbicide glyphosate was that it

A) could only be harvested in small quantities.
B) would often kill crops as well as weeds.
C) made the plants sensitive to salt.
D) reduced the vitamin A content of the plants.
E) was rather ineffective at killing weeds.