The oxygen is inhaled to the blood vessel which brings the oxygen to a cell.
Answer:
The correct answer is c. are relatively larger than humans.
Explanation:
The olfactory bulbs of the sheep are two or three times larger than humans, and therefore, they provide them a greater sense of smell, which in their case, is indispensable for surviving. This serves them for finding food, as well as finding their babies and other things.
Your answer would be Why are Sea Lampreys a problem in the Great Lakes?
In the text, it explains the answer for this question. For the other three questions, it's asking for a factor of the paragraph rather than the whole thing. The whole paragraph explains the answers for all of the questions, so it's best to ask why are they causing problems.