Problem
Domestic cattle often have interactions with wild animals. In South America, vampire bats drink the blood of sleeping cattle. Disease may spread through these bites. However, loss of blood does not cause great harm to the cattle. In North America, wolves sometimes attack and eat young cattle.
i. What are the names of these two interactions with cattle, and how do they differ from each other? In which situation are cattle hosts?
ii. What would the interaction between the cattle and the vampire bats be called if the bats drank blood but somehow caused no harm at all to the cattle? Explain your answer.