life span


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life span

The maximum obtainable age of a member of a species.
See also: span
References in periodicals archive ?
Heritability is a measure of how much of the variation in a trait -- in this case life span -- can be explained by genetic differences, as opposed to non-genetic differences like lifestyle, sociocultural factors, and accidents.
So it seems to me that in order for evolution to evolve a 30-fold difference in life span with so few really clear genetic differences, evolution maybe had to tweak hundreds, if not thousands, of genes.
(59) However, given the magnitude of personality change observed across the life span, (39(p15)) and its associations with changes in various life circumstances, (50) it is unlikely that this phenomenon is largely attributable to a measurement artifact.
The researchers began the study armed with the understanding that a reduction in insulin signaling lengthens fly life span because when there is less insulin there is more of a protein called dFOXO.
TDK has achieved substantial increases in the life spans of semiconductor memory storage devices.
Since there are many similarities between fruit flies and humans on a genetic level, the scientists are optimistic that finding the right balance of amine acid consumption could extend life spans without compromising fertility or sacrificing our favorite foods.
Restricting normal food intake by 60% increased the mean life span of rats by 33%.
This "evidence" comes from the life spans given in Genesis.
Over the eons, each species' characteristic life span has been delimited by the forces of survival and natural selection.
With all the environmental concerns I do not, at the moment, see any decrease in the life span of humankind.
Its average life span is shorter, it has a shorter gestation period and normally tends to produce litters of several young.
The interest in it started three years ago when a group led by Harvard Medical School biologist David Sinclair reported that it boosted yeast cells' life span by 70 percent via a mechanism resembling CR.