The concept of 'biological immortality' has long fascinated scientists, yet its practical implications remain poorly understood. Recent research on the hydra, a freshwater invertebrate, suggests that its stem cells possess an extraordinary capacity for continuous self-renewal, effectively bypassing senescence. However, this does not imply invulnerability; hydras still succumb to predation, disease, or environmental stress. In contrast, some species of jellyfish, such as Turritopsis dohrnii, can revert to an earlier developmental stage after reaching maturity, a process akin to cellular reprogramming. While these discoveries hint at mechanisms that could inform human aging research, experts caution that translating such regenerative abilities to complex organisms like mammals is fraught with obstacles, including the risk of uncontrolled cell growth, which could lead to cancer. Thus, while biological immortality offers a compelling model for studying longevity, its direct application to human medicine remains speculative at best.
❓ 根据文章，将水螅和水母等生物的再生机制应用于人类医学的一个主要挑战是什么？
A. A. Эти организмы слишком эволюционно далеки от человека для какого-либо сравнения.
B. B. Процесс регенерации может вызвать вредоносную пролиферацию клеток, например, рак.
C. C. Стволовые клетки человека не могут быть перепрограммированы ни при каких обстоятельствах.
D. D. Продолжительность жизни гидр и медуз слишком коротка для содержательного изучения.
✅ 正确答案
B. The regeneration process may trigger harmful cell proliferation, such as cancer.
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