Snails can have a long life. The life span for snails depends on their habitat and the species. Some of them only live for about 5 years. However, others in the wild are believed to be up to 25 years old in unusual occasions. 3.
Facultative means optional or discretionary (antonym obligate), used mainly in biology in phrases such as: 1  Facultative anaerobe, an organism that can use oxygen but also has anaerobic methods of energy production. It can survive in either environment. Facultative biped, an animal that is capable of walking or running on two legs as well as walking or running on four limbs or more, as appropriate.
Facultative Halophile. Organism that can grow at high salt concentrations but is not dependent on those high salt concentrations for growth. For more on this topic, see Wikipedia and Google. Contact web master. Return to home.