Question 7 1 pts which of the following applies to manganese nodules? (check all that apply.) they contain iron, cobalt, and nickel. they commonly form around a nucleus. they grow very slowly. they are hydrogenous in origin

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.