noun retÂ·roÂ·gresÂ·sion \Ëre-trÉ-Ëgresh-Én\. : a reversal in development or condition: asa: return to a former and less complex level of development or organizationb: subsidence or decline of symptoms or manifestations of a disease.
Habitat. Slime molds live in somewhat variable habitats all over the world. Generally slime molds live in damp areas of vegetation. They live under rotting logs and damp leaves. Some of the other habitats that slime molds will inhabit include water such as tropical fish tanks.
In his original five-kingdom scheme of life, Whittaker placed the slime molds together at the base of the fungi (4), while admitting that they stuck out of his mitten scheme âlike a sore thumbâ (5). Olive, however, argued that the slime molds have little in common with fungi and should be classified as protists (6).