lichen is unicellular or multicellular.

Answer 1

Lichens are not classified as unicellular or multicellular organisms in the traditional sense. Instead, they are a symbiotic association between a fungus (which is typically multicellular) and one or more photosynthetic organisms, such as algae or cyanobacteria (which can be unicellular or multicellular). Most lichens we commonly see are multicellular structures formed by this partnership, but they consist of both fungal and photosynthetic components working together.