Where are lichens found? How are lichens arranged? How do they eat?

1) Where are lichens found? 2) How are lichens arranged? 3) How do they eat? 4) Why are lichens called the pioneers of vegetation? 5) What is their practical significance? 6) What is the phenomenon of symbiosis? 7) What other examples of symbiosis are you familiar with?

1) Lichens can be found in many places: on tree trunks, on walls of houses, on roofs, on stones, etc.

2) Lichens are composed of an upper and lower cortical layer and a pith. The first protects the plant from direct sun exposure, and the second promotes the penetration of air to the cells.

3) Nitrogen feeds lichens. Some species receive nitrogen compounds from various waters, while the layers of lichens are completely saturated with water.

4) Lichens are a biological compound of algae and fungi.