When two organisms live together so closely that they merge into a functional unit, this is known as symbiosis. In the "1+1=1" project, an international, interdisciplinary research team is ...

Flagellate: an organism that uses a flagellum for locomotion. Microorganism: a tiny organism, often made of a single cell, that can be seen only under a microscope. Paramecium: a group of protozoa, or ...

Moreover, only cells within a single Paramecium species can mate with one another. The process is easily distinguishable under laboratory conditions. "The cells stick together. They can actually ...