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Biological Classification — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYBiological Classification2 Marks
Question
Justify that lichens are the pioneer organisms.
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Answer

Lichens are the pioneer organisms in the new terrains which colonise bare rocks, mountains and cliffs. They corrode the rocks and accumulate a certain amount of minerals and organic matter. The plants like mossess and grasses appear later in succession, utilising the first soil formed by lichens. Lichens thus, can convert a barren area into one that can support vegetation.

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