Consider the following statements about Lichens: 1. Lichens are algae 2. Lichens are autotrophs 3. Lichens are fungi 4. Lichens are symbiotic lifeforms 5. Lichens are saprotrophs Choose the correct statements:

About Lichens

• Lichens are the result from symbiotic and advantageous interactions between fungal and algae or cyanobacteria. Hence, statement 1 and 3 are incorrect and 4 is correct.
• The autotrophic and heterotrophic, respectively, algal and fungal components are referred to as phycobiont and mycobiont. Hence, statement 2 is correct.
• Fungi provide refuge, water absorption, and nutrient absorption for algae, whereas algae prepare food for fungi.
• Lichens are excellent indicators of pollution since they don't develop in contaminated environments.
• They are saprotrophic in nature i.e. they feed upon the dead and decaying organisms. Hence, statement 5 is correct.