How do you change your computer screen from landscape to portrait setting? My son was playing with the computer and when I looked at the screen he somehow changed it to a landscape appearance rather than standard portrait.
Lichens have been described as dual organisms because they are symbiotic associations between two (or sometimes more) entirely different types of microorganism 1  -. a fungus (termed the mycobiont). 2  a green alga or a cyanobacterium (termed the photobiont).
Lichens are unlike any other organism on earth. Their structure is unique: a symbiosis of two organisms  a fungus and algae. Lichens are not plants, so they do not produce seeds. Lichens can survive in some of the most barren and severe regions of the world.