The abundance of nutrients at the ocean's surface is a result of
a. seamounts.
b. deep currents.
c. tides.
d. upwelling.

The vegetation that thrives in the tundra is limited to a. mosses, barley, wheat, and corn. b. coniferous trees. c. dwarf shrubs, mosses, lichen, potatoes, and beans. d. mosses, lichen, algae, and dwarf shrubs.

Which types of seismic waves travel through earths interior? select all that apply. a) l waves b) p waves c) s waves

Abird flies at a speed of 75 metres per second for 15 seconds, how far does the bird fly