The strongest jet streams are the polar jets. And they are located at high altitudes (30000-39000 ft.) over sea level. There are northern and southern polar streams.
The correct answer is C) There is a larger variety of MHC proteins that can be expressed on the cell surfaces of their immune cells, providing a wider opportunity to recognize and attack pathogens.
The answer would be (C). If more herring emigrate (leave) from the region, then there will be less herring for the sea lions to use as a food source. This could lead to a decrease in the sea lion population.
