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Obligate scavenging (subsisting entirely or mainly on dead animals) is rare among vertebrates, due to the difficulty of finding enough carrion without expending too much energy. Well-known invertebrate scavengers of animal material include burying beetles and blowflies, which are obligate scavengers, and yellowjackets. Fly larvae are also ...
Obligate mutualism is a special case of mutualism where an ecological interaction between species mutually benefits each other, and one or all species are unable to survive without the other. [1] In some obligate relationships, only one species is dependent on the relationship.
Remora are specially adapted to attach themselves to larger fish (or other animals, in this case a sea turtle) that provide locomotion and food.. Commensalism is a long-term biological interaction in which members of one species gain benefits while those of the other species neither benefit nor are harmed. [1]
An obligate ovivore or egg predator is an animal that feeds exclusively on eggs. [2] This is different from an egg parasite, an animal such as a parasitic wasp which grows inside the egg of another insect.
The pygmy mammoth is an example of insular dwarfism, a case of Foster's rule, its unusually small body size an adaptation to the limited resources of its island home.. A biological rule or biological law is a generalized law, principle, or rule of thumb formulated to describe patterns observed in living organisms.
Obligate anaerobe, an organism that cannot survive in the presence of oxygen; Obligate air-breather, a term used in fish physiology to describe those that respire entirely from the atmosphere; Obligate biped, Bipedalism designed to walk on two legs; Obligate carnivore, an organism dependent for survival on a diet of animal flesh.
An obligate parasite or holoparasite is a parasitic organism that cannot complete its life-cycle without exploiting a suitable host. If an obligate parasite cannot obtain a host it will fail to reproduce. This is opposed to a facultative parasite, which can act as a parasite but does not rely on its host to continue its life-cycle.
Theropod dinosaurs such as Tyrannosaurus rex that existed during the late Cretaceous, although not mammals, were obligate carnivores. Large hypercarnivores evolved frequently in the fossil record , often in response to an ecological opportunity afforded by the decline or extinction of previously dominant hypercarnivorous taxa .