Ecologists are particularly concerned about pathogens because
A) human activities are transporting pathogens around the world at alarming rates.
B) pathogens are evolving faster than ever before.
C) host organisms are not coming up with defenses against pathogens.
D) new technologies have allowed microbiologists to classify more new pathogens.
E) pathogens that infect organisms at the community level will eventually infect human beings.
Correct Answer:
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