Answer:
predators to the deer
Explanation:
wolves are predators to the deer because the population of deer increased when the wolf population went down.
Answer:
C. as nonspecific defenses, because they bar or stop infections without discriminating pathogens from other agents
Explanation:
The skin, tears and stomach acid are nonspecific defenses and they are some of the examples of the body's first line of defense. Nonspecific defenses are made up of interferons, chemical barriers (e.g. tears and stomach acid), inflammation and physical barrier (e.g. skin).
These nonspecific defenses defend the body from pathogens through their chemical contents in the body fluid or the tissue.
For example, Stomach acid is made of hydrochloric acid (HCl), HCl is potent enough to destroy pathogens that make its way into the stomach through food; this kind of barrier is a chemical barrier.
So also, the skin is a physical barrier which serve as a defense against pathogens.
<span>The correct answer is letter D, non-point source pollution is difficult to regulate, because its source is difficult to track.These are pollution indirectly cause by land run-off, precipitation, among others. It is also caused by rainfall or snow melt that's moving on top or through the ground. NPS can actually cause pollution on drinking water.</span>
Different teachers teach this differently but here: procedure is usually what its called.
