pa laboratorijas līniju Even after many decades of research, the experts still debate how best to classify them. For many years the organisms pictured here were labelled ‘fungus’, because part of their life cycle is like that of many fungi. Mostly, though, they move and feed like one-celled ‘animals’. Yet they make their own cellulose, like a plant. And incredibly, as we shall see, there are times when they look and move like multi-celled animals. Part of their life cycle is also very similar to certain bacteria. Just what are they?