A farmer found that caterpillars were eating his corn. He sprayed his field with pesticide to kill them. For the first three years, this treatment worked well, leaving only a few caterpillars in the field. Based on what is known about natural selection, what can he expect in succeeding years if he continues to use the same pesticide?
The caterpillar population will develop resistance to the pesticide if any of them survived it because they were genetically different from the rest.
The caterpillar population will remain at very low levels every year the pesticide is applied, since it keeps them from reproducing well.
The caterpillar population will continue to be successfully controlled by the pesticide indefinitely, since it has worked for three years.
The caterpillar population will eventually be exterminated completely, and it will likely become extinct.