Question

Write a note on lichens.

Answer 1

Answer:

LICHEN

• Thallophytic plant.
• Occurs at crusty patches or bushy growths on tree trunk or rock or bare grounds etc.
• Lichen includes Blue green algae or algae and fungi.

Characteristics of lichen

• It is the indicator of SO2 pollution.
• Lichen is a example of mutualism.

Mutualism

• The relation between two different species of organism that are interdependent , each gains benefits from other.
• They are co-evolution.
• They are co-extinction.
• They are co-existance.