What are the differences between mushrooms and lichens, and what do they have in common?

Mushrooms are a separate kingdom of living nature. There are hundreds of thousands of species of mushrooms. Lichens are not a type of mushroom. Lichens are a symbiosis of fungi and algae. Recall that symbiosis means a beneficial union of the two. In this case, it is the union of the kingdom of mushrooms and plants. There are several thousand species of lichens. They all grow in places with more air pollution. They are also adapted to a variety of adverse conditions. For example, a lichen can live in a vacuum for more than 11 days.