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Sunflower sea star regenerates its arms. Dwarf yellow-headed gecko with regenerating tail. Regeneration in biology is the process of renewal, restoration, and tissue growth that makes genomes, cells, organisms, and ecosystems resilient to natural fluctuations or events that cause disturbance or damage. [1]
While most species require the central body to be intact in order to regenerate arms, a few tropical species can grow an entirely new starfish from just a portion of a severed limb. [2] Starfish regeneration across species follows a common three-phase model and can take up to a year or longer to complete. [ 2 ]
A white-headed dwarf gecko with tail lost due to autotomy. Autotomy (from the Greek auto-, "self-" and tome, "severing", αὐτοτομία) or 'self-amputation', is the behaviour whereby an animal sheds or discards an appendage, [1] usually as a self-defense mechanism to elude a predator's grasp or to distract the predator and thereby allow escape.
Endothermy does not provide greater speed in movement than ectothermy (cold-bloodedness)—ectothermic animals can move as fast as warm-blooded animals of the same size and build when the ectotherm is near or at its optimal temperature, but often cannot maintain high metabolic activity for as long as endotherms.
Surviving in the wild is no easy feat, but thanks to evolution, many animals evade their predators with a clever deception of the eyes. Since the beginning of time animals have either adapted or ...
A so-called "cathedral" mound produced by a termite colony. Structures built by non-human animals, often called animal architecture, [1] are common in many species. Examples of animal structures include termite mounds, ant hills, wasp and beehives, burrow complexes, beaver dams, elaborate nests of birds, and webs of spiders.
The liver can rapidly regenerate its damaged tissue, preventing liver failure. However, the speed of liver regeneration depends on whether interleukin 6 (IL 6) is overexpressed. [ 18 ] IL 6 is a critical component in priming the hepatocytes for proliferation and it has the crucial role in initiation of the acute phase response in hepatocytes. [ 5 ]
The cheetah can give up the chase if it is detected by the prey early or if it cannot make a kill quickly. Being lightly built, cheetahs lack the raw strength to tackle down the prey, and instead catch the prey by performing a kind of foot sweep by hitting the prey's leg or rump with the forepaw or using the strong dewclaw to knock the prey off ...