By Joshua Mitteldorf
Because the Nineties, laboratory characterization of getting older has been diverging from predictions of evolutionary thought, particularly within the quarter of genetics. simultaneously, a technology of multilevel choice has discovered its position within the evolutionary literature. the writer means that proof warrants attention of a brand new paradigm for evolution of getting older, and proposes the demographic thought of senescence, wherein getting older has been affirmatively chosen since it degrees the dying price over the years, aiding to stabilize inhabitants dynamics and forestall extinctions. Read more...
summary: because the Nineties, laboratory characterization of getting older has been diverging from predictions of evolutionary conception, specifically within the region of genetics. simultaneously, a technological know-how of multilevel choice has discovered its position within the evolutionary literature. the writer means that proof warrants attention of a brand new paradigm for evolution of getting older, and proposes the demographic idea of senescence, wherein getting older has been affirmatively chosen since it degrees the dying expense over the years, aiding to stabilize inhabitants dynamics and stop extinctions
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Extra info for Aging is a group-selected adaptation: theory, evidence, and medical implications
Evol. Ecol. , 2006. 8: p. 561-574. 9. Mitteldorf, J. and C. Goodnight, Post-reproductive life span and demographic stability. Oikos, 2012. 121(9): p. 1370-1378. 10. Mitteldorf, J. and J. Pepper, Senescence as an adaptation to limit the spread of disease. J. Theor. , 2009. 260(2): p. 186-195. 11. Mitteldorf, J. C. Martins, Programmed life span in the context of evolvability. The American Naturalist, 2014. 184(3): p. 289-302. 12. Le Chatelier, H. and O. Boudouard, Limits of flammability of gaseous mixtures.
And shocking worms with short-term exposure to heat that is not quite sufficient to kill them actually makes them live longer . Exposure to pathogens enhanced both lifespan and fertility in fruit flies, compared to flies maintained in a sterile environment . Mice exposed to 25 or 50 times the normal background level of gamma radiation lived 20% longer than mice that received only the ordinary background . (Radiation hormesis has been embraced by the nuclear power industry and their apologists to support the fiction that nuclear power is safe.
It is a common plant and not particularly impressive to look at and perhaps the only remarkable thing about it is that it has been studied intensively. About one shrub in 70 dies each year, apparently from environmental factors, so that the plants have an average lifespan of 70 years. But the curious thing is that a 70-year-old plant does not seem to have a different mortality risk than a 10-year-old plant. Humans have a comparable lifespan to Sanicula, but because we age, very few humans reach 100 years old and none reach 150 years.