Question

Lichens are ecologically important because

• A. They are associated with mycorrhizal roots.
• B. They are association of algae and fungi.
• C. They are pioneers (earliest settlers on barren rocks) and pass xeric conditions successfully.
• D. They can grow in greatly polluted area.

Answer 1

The correct option is C They are pioneers (earliest settlers on barren rocks) and pass xeric conditions successfully.

Lichens are known as pioneer species, these can survive in places where higher plants finds it difficult to grow. Irrespective of the type of region, extremes in environmental conditions, mountainous terrains and high latitudes, lichens are good survivors. Besides these, the major ecological importance of the lichens are that these are poikilohydric. With little control over the status of hydration, these are able to tolerate irregular and even severe dessication. Thus, the correct answer is option C.