Which of the following themes differentiates the modern era from other historical periods

If scientists only detect p waves in a certain layer of earths interior what does that tell us?

How did geographic isolation affect the islands in the australasia ecozobne?

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.