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.
Viruses, bacteria, protozoans, fungi, and parasites differ in the following ways: viruses are among the smallest known infectious agents; bacteria are single-celled prokaryotic organisms that reproduce very quickly; protozoans are single-celled eukaryotic organisms that are generally much larger than bacteria; and fungi are eukaryotic organisms that have a rigid cell wall.