Question

Write a short note on Lichens ___!

Answer 1

Lichens :

• Symbiotic associations between algal ( phycobiont ) fungal component ( mycobiont ).

• The phycobionts are autotrophic and mycobionts are heterotrophic.

• Algae prepare food for fungi.

• Fungi provide shelter and absorb nutrients for alga.

• They are very good pollution indicators.

• They don't grow in polluted areas.

• They are non-vascular plants ie. they have no roots, stems, or leaves.

• Their presence indicates that there's absence of pollution in that area, and their absence indicates that the area is polluted.

Answer 2

Answer:

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→Lichen is an organism that is formed by the symbiotic association of a fungus and an alga or cyanobacterium and occurs as crusty patches or bushy growths on tree trunks, bare ground, etc. .

→ The fungus surrounds the algal cells, often enclosing them within complex fungal tissues unique to lichen associations.