The pioneer organisms in ecological succession are usually the? by Sunday | Sep 11 | Biology JAMB | 0 comments A. mosses B. lichens C. ferns D. algae Correct Answer: Option B – lichens Users Also Read These:The study which involves the inter-relationship…Micro-organisms which break down dead organisms and…Secondary succession is much faster than primary…Briefly explain FOUR ecological factors that affect…Organisms in an ecosystem are usually grouped…