Question

Lichens are __________

• A. symbiotic existence of blue-green algae and fungi
• B. symbiotic existence of rhizobium bacteria in the roots of leguminous plants
• C. co-existence of coral reef with zooxanthellae
• D. existence of mycorrhiza along with leguminous plants

Answer 1

Answer:

A. symbiotic existence of blue-green algae and fungi

• Lichens are the co-existence of blue green algae with fungi.

• Fungus protects the algae from sun light.

• In turn algae provide nutrition for fungus since fungus cannot prepare its own food due to absence of chlorophyll.