In which calluses did the new gene insert an existing corn gene?

Many farmers use chemical herbicides to kill weeds and

insecticides to kill insects. Using genetic engineering, scientists

have developed ways to resist harmful crop pests. In this Gizmo,

you will use genetic engineering techniques to create genetically

modified corn.

Explanation:

Many farmers use chemical herbicides to kill weeds and

insecticides to kill insects. Using genetic engineering, scientists

have developed ways to resist harmful crop pests. In this Gizmo,

you will use genetic engineering techniques to create genetically

modified corn.

i think the answer is b.

i think that it is plants