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 'dual' organisms. They consist of two (or more) different life-forms living together symbiotically in a more-or-less well defined body or thallus. The main partner is the fungus or mycobiont. The other partner is a green alga or a cyanobacterium (the photobiont).Many cyanobacteria are able to fix nitrogen which is an essential nutrient. In 10% of lichens (e.g. Collema and Leptogium) the photobiont is a cyanobacterium.ichens are named after the fungal partner. Placopsis gelida. The fungal partner provides a cosy, sheltered environment for the alga, protecting it to some extent from the elements and providing mineral nutrients.