Pioneer Organisms Surviving Without Soil

Lichens and mosses are classical pioneer species during ecological primary succession. Lichens (symbiotic algae-fungi associations) secrete organic acids that erode bare rock surfaces, while mosses establish dense mats over bare substrates without requiring true organic soil. Ferns require soil or damp sediment matrix beds to propagate, and mushrooms are saprophytic fungi that depend heavily on complex decaying organic matter rather than bare nutrient-less surfaces. > Lichens and mosses serve as primary pioneer species capable of colonizing and adapting to bare rock substrates. Answer: (c).