However, bed bugs have become resistant to even this chemical pesticide. what happened that allowed the bug population to increase? a) the chemicals used currently are weaker eliminate b) the chemicals no longer can penetrate bed bugs brains c) the bed bugs of today are exactly the same as the bed bugs of fifty years ago d) the bed bugs that survived the ddt years ago, reproduced new generations of chemical resistant offspring

Residential construction is expanding in florida, the expansion has caused fragmentation of habitats, one of the results of the increased construction is a decrease in the number of large predators such as the coyote, black bear and pool panther, which will be the most immediate local result of this fragmentation? 1)large predators will become extinct 2)decrease in middle sized predators 3)increase in population of top carnivores 4)increase in population of prey species