Sessile Definition And Quiz
Sessile By: BD Editors Last Updated: April 28, 2017 Sessile Definition Biologically speaking, an organism that is sessile (as opposed to motile) lacks the ability of self-locomotion and is predominantly immobile. In zoology, sessility applies to those animals which are attached to a substrate. Most often these are marine animals, such as mussels, although parasites such as the cochineal insect assume a fixed life cycle upon their plant hosts. Sessile organisms benefit from lower energy expenditure than motile creatures and can thus subsist on relatively low amounts of food, as they have a low metabolic rate....