Best Answer: Slugs: Slugs have important ecological roles. They help cycle organic matter, which in turns helps to build healthy, rich soil. They also are food for wildlife, including raccoons, possums, garter snakes, toads, turtles, and birds. Snails: Just like slugs, snails help break down organic matter.
Facultative anaerobe. Definition. noun. An organism which is capable of producing energy through aerobic respiration and then switching back to anaerobic respiration depending on the amounts of oxygen and fermentable material in the environment. Supplement.rganisms in the Kingdom Fungi can also be facultative anaerobic, such as yeasts. Word origin: an-from Gk., not, without, + Greek Äero -, from ÄÄr, air. Compare: obligate anaerobe. See also: facultative anaerobe, microaerophile, aerotolerant.
From Wikipedia, the free encyclopedia. A facultative parasite is an organism that may resort to parasitic activity, but does not absolutely rely on any host for completion of its life cycle. Examples of facultative parasitism occur among many species of fungi, such as family members of the genus Armillaria.