V Which outcome 1s possible using genetic engineering but not using selective breeding? Oa. a sheep with wool longer than wool produced by any other sheep
Ob. corn that produces one large corn cob per plant
c. a bacterium that produces human insulın
Od a hairless varnety of cow

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?