During which season does primary productivity reach its peak in polar oceans?

What is the result of the greenhouse effect? a. heat is deflected from the atmosphere. b. heat is released from the atmosphere. c. heat is kept in the atmosphere. d. plants are able to grow in the tropics where the air is the heaviest.

In north america, most winter storms form when cold, dry air from interacts with warm, moist air from

Find the equation of the line passing through the point (–1, 5) and perpendicular to the line 3x + y = 4.