99% of egypt’s population lives on only 3% of the country's land.
t or f

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.

Which soil layers comprise the topsoil? o horizon a horizon b horizon c horizon

The percentage of people in the united states engaged in agriculture in 2000 was approximately a. 56% b. 38% c. 21% d. 2%