Which type of organisms or cells may serve as a good model for extended longevity?

Question

Quizplus · Accepted Answer

Aquatic invertebrates such as Hydra and Turritopsis are good models for extended longevity as they exhibit both immortality and the ability to revert to an immature stage, allowing them to continuously renew their cells and avoid aging. Insects have a relatively short lifespan and mice and rats have been extensively studied but do not have significant lifespan extension compared to humans. Stem cells have potential to extend lifespan but their clinical use is still in early stages.

Which Type of Organisms or Cells May Serve as a Good