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 composed of two different species, but they function as one. They consist of a fungus and algae, living together in a symbiotic relationship where the fungus is the dominant organism. The algae are either green algae or blue-green algae, known as cyanobacteria.