Which organisms are typically the pioneer species in primary succession on bare rock?
Answer and explanation
Correct answer: A. lichens and mosses
- Step 1: Bare rock has no soil, so only hardy organisms can colonise it.
- Step 2: Lichens and mosses break down rock and add organic matter, forming the first thin soil.
Answer
lichens and mosses.
Why not the others: large trees such as oak: appear in the climax community, much later. grazing herbivores such as deer: need established plant cover to feed on. flowering shrubs and brambles: need soil that pioneer species help to form.
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