The definition of a force majeure is an overpowering force, or an unexpected or uncontrollable event. An example of a force majeure is an earthquake. 1  superior or overwhelming power.  an unanticipated or uncontrollable event or effect which releases one from fulfillment of a contractual obligation.
Algae can either be unicellular or multicellular. Seaweeds are examples of multicellular algae. On the other hand, protozoans are unicellular, and they are more animal-like. People describe protozoa as a blob without a definite shape since they lack a cell wall.
Lichens are a symbiotic relationship between fungus and algae. Their relationship is complex, but mutually reciprocal. The algae provides the fungus with nourishment while the fungus provides the algae with shelter so that it can grow.