Which of the following best describes an example of a nonspecific external response to infectious agents?
a: phagocytes consume infectious agents through the process of endocytosis.
b: the presence of infectious agents causes inflammation and swelling in localized areas.
c: sweat creates an acidic environment, which inhibits growth of infectious agents.
d: memory b cells recognize infectious agents and destroy them before they can enter the body.

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