Which of the following statements about secondary succession is true? a. Secondary succession occurs in ecosystems that have no vegetation. b. Secondary succession affects ecosystems that are already established. c. Ecosystems require pioneer species to undergo secondary succession. d. Secondary succession can occur in areas without soil.
B. A. is incorrect because before a disaster destroys the area, there was vegetation C. Primary succession requires pioneer species; secondary succession happens when there is already soil. D. is incorrect because of what I said in C.