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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 ]
All cnidarians can regenerate, allowing them to recover from injury and to reproduce asexually. Hydras are simple, freshwater animals possessing radial symmetry and contain post-mitotic cells (cells that will never divide again) only in the extremities. [14] All hydra cells continually divide. [15]
Some animals starve to death shortly after birthing their young while others are eaten by their own young -- but these mothers make the ultimate sacrifice. Click through for 10 animal mothers that ...
Self-preservation is essentially the process of an organism preventing itself from being harmed or killed and is considered a basic instinct in most organisms. [6] Most call it a "survival instinct". Self-preservation is thought to be tied to an organism's reproductive fitness and can be more or less present according to perceived reproduction ...
The Saharan silver ant (Cataglyphis bombycina) is a species of insect that lives in the Sahara Desert.It is the fastest of the world’s 12,000 known ant species, clocking a velocity of 855 millimetres per second (over 1.9 miles per hour or 3.1 kilometres per hour).
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 ...
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 ]