Afarmer 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 pesticide will become less and less effective as the species are going to continue to become resistant to the pesticide as the resistant ones arent killed by the pesticides so they are more likely to survive and to reproduce so they will become predominate as the pesticide is no longer effective to the resistant caterpillar
hope that helps  

Well let's uhmmm how many bedrooms you want. if you want a garage. not to mention the price of the house?