The body uses specific methods to address pathogens that are causing illness. what are some of the body’s nonspecific defenses against invading pathogens?
a.
antibiotics
c.
antibodies
b.
mucus, sweat, and tears
d.
killer t cells

Apart of an ecosystem that can restrict the growth of a population is referred to as

Which is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.

What is the importance of having the us forest service, the bureau of land management, the us fish and wildlife service, and the national park service? to manage land resources for conservation and the development of natural resources to manage land resources for conservation and the development of urban areas to preserve historical landmarks and manage the development of urban areas to preserve historical landmarks and manage the development of rural areas