The eubacteria are found abundantly almost everywhere but are difficult to observe due to their size. Masses of cyanobacteria appear in the field as blue-green, brown, or black slime on rock, soil, or tree bark. Kingdom Protista Protistans come in many forms, but most are unicellular and all are microscopic. The cells have a nucleus and membrane-bound organelles. Aquatic fungi usually have non-motile, colorless, heterotrophic, vegetative cells, but sometimes a reproductive cell is pigmented or motile.
Protozoans are generally lightly-colored, flexible, motile, heterotrophic cells.
Due totheir small size, protists are difficult to observe in the field. Kingdom Fungi The fungi are a diverse assemblage of organisms. Jelly, coral, disc, sponge, and gilled fungi each come in a bewildering array of forms. All fungi have an underground web-like network of cells called mycelium. The mycelium is the vegetative body of a fungus.