<em>Examples of a nonspecific external response to infectious agents and harmful bacteria are the following;</em>
Mucus, saliva, and tears.
They are nonspecific external responses that help to prevent pathogens from entering our bodies.
The specifics contain types of enzymes that break down the bacterial cell walls. An external response of Mucus tends to trap pathogens as well.
Water travels from roots to leaves, where it is used for photosynthesis.
B. producer because most autotrophs are green plants use light for energy.
From the deepest to most superficial: pia mater, arahnoid, dura mater
