Some biologists believe that the latitudinal gradient in species diversity reflects the fact that high latitudes were recently covered by large glaciers (within the last 10,000-15,000 years). If there had been no recent ice age, would we still expect to see a latitudinal diversity gradient?

How did the lab activities you answer the lesson question: what effect does plate movement have on geologic events and structures at earth’s surface? what did you learn from conducting this lab?

What is the general rule about surface currents? cold water flows along the ocean floor towards the equator. the east coasts of continents have cold surface currents, and the west coasts of continents have warm surface currents. seasonal and constant offshore winds create significant upwelling along the west coasts of south and north america and africa. the west coasts of continents have cold surface currents, and the east coasts of continents have warm surface currents.

How much water is in the ocean in cubic kilometers