linkedin post 2018-08-08 05:03:12

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TELOMERE HYPOTHESIS. "A current hypothesis gaining prominence proposes that activation of the enzyme telomerase is necessary for cells to become immortal, or capable of proliferating indefinitely. The theory suggests that almost all cancer cells must attain immortality for progression to malignant states and, hence, require activation of telomerase.” https://lnkd.in/efS2ct4 View in LinkedIn
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linkedin post 2018-08-07 03:41:00

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DISPOSABLE SOMA. "It was considered as “a priori” assumption that bacteria have not separation between soma and germ-line, and therefore under the paradigm of disposable soma theory, that is the soma is the only biological entity that would undergo senescence (aging, the bacteria could not age." https://lnkd.in/d8UFqbd View in LinkedIn
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linkedin post 2018-08-07 03:37:11

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AUTUMN LEAVES seem best to illustrate Weismann’s worn out cell idea; after the wear and tear of a season of respiration, photosynthesis, disease and battering by the elements, leaf defects are multiple and very hard to repair: it is easier to jettison the leaf and start over again than to repair multiple cellular defects. View in LinkedIn
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linkedin post 2018-08-09 04:14:13

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AGING AND SPECIES. “A more parsimonious evolutionary explanation for the existence of aging therefore requires an explanation that is based on individual fitness and selection, not on group selection. This was understood in the 1940's and 1950's by three evolutionary biologists, J.B.S. Haldane, Peter B. Medawar and George C. Williams, who realized that aging does not evolve for the "good of the species". http://www.nature.com/scitable/knowledge/library/the-evolution-of-aging-23651151 View in LinkedIn
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linkedin post 2018-08-11 03:57:21

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CANARY IN THE MINE. “The House Sparrow Passer domesticus population in Britain suffered a major decline in the 1920s, particularly in built-up areas, which coincided with the replacement of the horse by the internal combustion engine.” Not just from toxic fumes but from the loss of the oat spill from horse feed bags. https://www.britishbirds.co.uk/wp-content/uploads/article_files/V96/V96_N09/V96_N09_P439_446_A004.pdf View in LinkedIn
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linkedin post 2018-08-11 03:54:44

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THIRTY YEAR FINDING. “The decline of the house sparrow in the UK is a relatively recent phenomenon. From around 13 million pairs in the early 1970s, numbers are now estimated to stand somewhere between 2.1 and 3.7 million: a 71 per cent drop in the national breeding population from 1977 to 2008.” https://lnkd.in/eTu-5Ri View in LinkedIn
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linkedin post 2018-08-11 03:53:16

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MASSIVE LOSSES. “Common birds such as sparrows, starlings and skylarks are suffering "alarming" declines in their numbers, a new study has warned. Figures from bird monitoring schemes suggest that populations of the most widespread species have dropped by around 421 million across Europe since 1980.” https://lnkd.in/eCjmgmA View in LinkedIn
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linkedin post 2018-08-11 03:51:21

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INTERDEPENDENCE. “The house sparrow, Passer domesticus is unique among wild birds in its close association with virtual dependence on man, not only in the agricultural environment, where presumably this association first evolved, but also in built-up areas. It would be expected that, with man’s dominance of the world, the future would be a bright for house sparrows, but it is now becoming an evident that this is not the case, particularly in the urban and sub-urban areas.” https://lnkd.in/e6evZ-H View in LinkedIn
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