Question

Hydra is said to be immortal . What could be the reason for this ?
( Hint : How does Hydra reproduce ?

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Answer 1

Hydra are just one of the many organisms which are immortal. That is to say all their cells divide forever - there is no senescence in any of their cells. Interestingly Hydrae that reproduce sexually age and die, but asexual reproduction appear to be immortal. Animals that are immortal more often reproduce asexually... this may only be because immortality became unpopular in evolution early on and may have not developed senescence in the way other animals have, or lost it when it was not so integral to life.

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Answer 2

Hydra are just one of the many organisms which are immortal. That is to say all their cells divide forever - there is no senescence in any of their cells. Interestingly Hydrae that reproduce sexually age and die, but asexual reproduction appear to be immortal. Animals that are immortal more often reproduce asexually... this may only be because immortality became unpopular in evolution early on and may have not developed senescence in the way other animals have, or lost it when it was not so integral to life.

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