TERMIN: Opis terminu.
obligatory
Kontekst: Ekologia.
The animal has no option. Contrast with facultative.
Źródło bibliograficzne
Barlow, George W. 2002. "The Cichlid Fishes (Nature's Grand Experiment in Evolution)". Perseus Publishing. 352. ISBN: 9780738203768 (crc03927) (streszczenie)