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- a. Which parasites are zoonotic?b. Which are strictly human parasites?c. Which are borne by vectors?d. Which cause intestinal symptoms?e. Which are hermaphroditic?f. Which are associated with rare or raw meat?Describe the life cycle of the human hookworm? How was john D. Rockfeller and southern US commerce involved in this story?how far away from a pile of poop can a hookworm crawl before dying? How did Rockfeller's medical investigators eradicate the hookworm problem, as well as many excrment- related parasitic disease?Do frogs have a cecum?