Who was the first man to land in india?

The most direct route from south america to asia is across the ocean.

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 is the amount of organic matter in all living organisms in a habitat called?