Algae
The word "algae" refers to a wide variety of organisms that come from many different phyla in the taxonomic system, but all belong to the kingdom "Protista." All algae contain chlorophyll and can create their own energy, like plants, and are considered plant-like. Some are unicellular while others are multicellular, with seaweed being a well-known type of multicellular algae.
Protozoans
Protozoa also belong to the kingdom "Protista." These organisms are unicellular and are classified by their method of movement. They can swim by using flagella, which are whiplike strands, cilia or pseudopods, which are extensions of the cell that pull it along, or they do not move at all. Amoebas are a type of protozoa that is very familiar. Some protozoans are responsible for human diseases, such as malaria.