Like most ciliates, Paramecium undrego a special process called conjugation. During conjugation, individuals from two different strains align longitudinally and exchange nuclear material. This exchange seems to rejuvenate the individuals and is usually followed by frequent mitosis. Phylum Rhizopoda Amoebas occur throughout the world in marine, freshwater, and terrestrial environments. The unifying characterisic of this phylum is the presence of pseudopods, which are movable extensions of cytoplasm used for locomotion and gathering food.
Amoebas lack glagella and most reproduce asexually.
Phylum Myxomycota Slime molds have often been classified in kingdom Fungi, but they have amoeboid characteristics such as phagocytic nutrition and unique unicellular forms and assemblages. They also lack the prominent hyphae of fungi. Slime molds also do not contain chitin in their cell walls as do fungi.