10 Questions
What complicates the determination of an organism's natural lifespan?
Practical difficulties in measuring age for extremely old organisms
What does it mean for a species to be biologically immortal?
The species does not age and the mortality rate remains constant after maturity
Which organism is mentioned as capable of cycling from a mature adult stage to an immature polyp stage and back again?
Turritopsis dohrnii
What is a challenge in estimating the age of the hydrozoan species Turritopsis dohrnii?
It is difficult to observe a single specimen for an extended period
What can be repeated but results in physiological deterioration for skin beetle larvae?
Cycling from a mature adult stage to an immature polyp stage and back again
Which definition of 'longest-living' is considered in the article?
The age of the oldest known individuals currently alive
What is excluded from the definition of 'longest-living' in the article?
The length of time between the earliest appearance of a species in the fossil record and the present
What does the article define as the 'longest-living' for a given species?
The individual with the longest natural maximum life span
What is NOT considered in the article's definition of 'longest-living'?
The geographical distribution of the species
What type of individuals are considered in the article's definition of 'longest-living'?
The oldest known individuals currently alive with verified ages
Explore the list of the longest-living biological organisms, including individuals or clones of a species with the longest natural maximum life spans. Learn about verified individual record holders and the definition of 'longest-living' used in this article.
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