Two places that are closer together will generally have more interactions than two places are further apart, a geographic concept known as

This word for a bug or malfunction was popularized in the 1962 book into orbit by the mercury astronauts

What evidence does the writer give to support his argument about coral reefs? a) he speaks of the activities of coral polyps. b) he describes the composition of the great barrier reef. c) he emphasizes the ways in which coral reefs are fragile. d) he points out the ways that scientists do research on the reefs.

What are the answers for the following questions?