The present page holds the title of a primary topic, and an article needs to be written about it. It is believed to qualify as a broad-concept article. It may be written directly at this page or
drafted elsewhere and then moved to this title. Related titles should be described in Facultative, while unrelated titles should be moved to Facultative (disambiguation).
Look up facultative in Wiktionary, the free dictionary.
Facultative means "optional" or "discretionary" (antonym obligate), used mainly in biology in phrases such as:
Facultative (FAC), facultative wetland (FACW), or facultative upland (FACU):
wetland indicator statuses for plants
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 carnivore, a carnivore that does not depend solely on animal flesh for food but also can subsist on non-animal food. Compare this with the term
omnivore
Facultative
photoperiodic plant, a plant that will eventually flower regardless of night length but is more likely to flower under appropriate light conditions.
This
disambiguation page lists articles associated with the title Facultative. If an
internal link led you here, you may wish to change the link to point directly to the intended article.