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生物能永生吗?

所属:生活杂谈 来源:www.rd.com 阅读:4715 次 评论:3 条 [我要评论]  [+我要收藏]

小编摘要:生物能永生吗?答案是——不朽的水母。

生物能永生吗?

Yes.


We are proud to introduce: the immortal jellyfish.

Reproduction by budding occurs in thousands of species, and has gone on with few modifications for half a billion years. What makes the jellyfish Turritopsis nutricula so special is that once it reproduces, it doesn't die, but transforms itself back into its juvenile polyp state, resembling a stalk with tentacles like a tiny sea urchin. Their adult cells--even their eggs and sperm--melt into simpler forms of themselves, and the whole organism becomes "young" again. Barring any sea-borne dangers, there is no biological reason why it can't live forever.

答案揭晓:是。

我们将自豪地向你介绍 —— 不朽的水母。

成千上万的物种通过出芽进行繁殖,这是亘古不变的规律。而使灯塔水母显得如此特别的原因是,一旦它开始繁殖,它不会死,而是会重新回到幼年水蛭状态,看上去就像一个拥有小型海胆触手的叶柄。它们的成年细胞 —— 甚至包括它们的卵子和精子,都会融化消散成类似于它们自身的更简单的形态。而且所有的有机体都会 “返老还童”。排除所有来自于海上的威胁,我们找不到任何生物学的理由来证明它们不可能永生。
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2011-10-19 23:16 编辑:kuaileyingyu
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