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).
What Two Roles Do Lichens Play in an Ecosystem? By Marie-Luise Blue; Updated April 25, 2017 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. The algae produce carbohydrates through photosynthesis which serve as food for the fungus, while the fungus physically protects the algae and provides it with moisture. Lichens can live in a wide range of locations and climates -- from the polar regions to the tropics.