Learn about the structure and diagram of amoeba , a fresh water and free living organism with irregular body and pseudopodia. Find out its features, nutrition, reproduction and more. Read this article to learn about the Structure and Life Cycle of Amoeba ! Systematic Position Phylum: Protozoa Class: Rhizopodea Order: Amoebida Genus: Amoeba Species: proteus Amoeba proteus is a unicellular organism widely distributed in ponds, lakes, freshwater pools and slow streams. Normally it is found creeping, feeding upon algae, bacteria etc. Under the microscope, it appears as irregular, jelly-like tiny mass of hyaline protoplasm. Amoeba has no fixed shape and the outline of body ... Learn about amoeba , a unicellular organism with no definite shape that can move and eat using pseudopodia. See its parts, structure, and diagram , and how it reproduces and adapts to different conditions. Amoeba : Cell, Diagram , Classification, Nutrition Amoeba sp. is a single-celled, colorless microscopic protozoan. Amoeba comes under the Protista Kingdom. In this article get a clear idea about amoebas, the structure,locomotion,reproduction and more.