Final answer:
Selective breeding of wild weed or corn plants has changed them in all of the following ways except reduced resistance.
Step-by-step explanation:
The selective breeding of wild weed or corn plants has changed them in all of the following ways except reduced resistance.
Selective breeding involves choosing and mating plants with desirable traits to pass those traits onto the next generation. This process has led to an increase in yield, alteration of taste, and modification of size in crops. However, reducing resistance is not a common outcome of selective breeding.