What is Characteristics of a lichen?

Lichens are unique symbiotic organisms formed by the mutualistic association of fungi and photosynthetic partners, typically algae or cyanobacteria. They exhibit a variety of forms, including crustose, foliOSe, and fruticose, and can thrive in extreme environments. Lichens are known for their ability to absorb moisture and nutrients from the air, making them sensitive indicators of environmental health. Additionally, they can reproduce both sexually and asexually, contributing to their resilience and adaptability.