IELTS articles

2021-11-16 14:06:19 These results point to a fat-tailed breed; though these sheep lack овечьей шерсти, they have fat in their tails that makes their hinds look particularly perky. The researchers suggest that this ancient sheep breed was probably raised for meat or milk production, much like the fat-tailed домашний скот living in present-day Iran, northern Africa and parts of Asia.

“This study shows us that the people of Sasanian-era Iran may have managed flocks of sheep specialized for meat consumption, suggesting well developed husbandry practices,” says Daly in the statement.

The researchers caution that this specimen is just a single individual, making it difficult to draw definitive conclusions about ancient sheep одомашнивание in the region.

Still, the study highlights how the повседневный act of eating—and the diners’ table manners—can be accidentally preserved for потомства, all thanks to the fortuitous environment where the meal took place.

“We weren’t expecting to see that level of preservation,” lead author Conor Rossi, a geneticist at Trinity College Dublin, tells Live Science. “This site is something truly remarkable.”

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2021-11-15 12:13:58

342.Breed - порода

343 .To descend - происходить (генетически)

344.Cattle - крупный рогатый скот

345.Contemporary - современный

346.To shear - стричь (овец)

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2021-11-15 12:13:42 The sheep’s DNA profile revealed that it was genetically similar to the породам that populate Southwest Asia today. According to a statement, the result implies that modern sheep may be directly происходили from this ancient крупного рогатого скота variety.

As Tom Yun reports for CTV News, the earlier animal probably looked quite different from the современных sheep now living in North America. It lacked the gene for a woolly coat, instead bearing the gene variant for a hairy one. On top of the DNA analysis, nanoscale imaging of the sheepskin’s hair fiber confirmed that its coat was the shorter kind that didn’t require стрижки.

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2021-08-03 11:08:38

337.Desiccated - высушенный, сушёный

338.Dubbed - названный, называемый, прозванный

339.To disintegrate - расщеплять, распадаться

340.Strand - нить (ДНК, белка)

341.To sequester - изолировать, блокировать, соединять

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2021-08-03 11:08:25 This isn’t the first time that extraordinarily well-preserved biological specimens have been found at the Chehrabad salt mine: Between the 1990s and early 2000s, a different group of researchers discovered the ancient remains of eight similarly высушенных humans.

Прозванный the “Salt Men” (although they included one woman, too), some of these 1,300- to 2,500-year-old historical specimens still boast head and facial hair.

For the study, the team extracted DNA from a skin sample cut from the sheep’s leg. Thanks to the salt, the sheep’s DNA molecules were “so well preserved and not fragmented, despite their age,” says senior author Kevin Daly, a research fellow at the Smurfit Institute of Genetics at Trinity College Dublin, to Live Science.

Normally, DNA in a carcass is quick распадаются , as the animal cells’ enzymes degrade the нити by splitting the chemical bonds with water. But salt изолирует water molecules, rendering them unavailable for these chemical reactions. Daly’s team also found DNA aplenty from salt-loving bacteria and archaea, both of which probably helped preserve the sheep leg.

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2021-07-26 13:07:09

332.To gnaw - [nɔː] - грызть, глодать

333.To chuck - бросать

334.Limb - конечность

335.Husbandry - животноводство, сельское хозяйство

336.Saline - [ˈseɪlaɪn] - соляной, содержащий соль

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2021-07-26 13:06:59 Researchers Recover DNA From 1,600-Year-Old, Naturally Mummified Sheep Leg

The molecules offer insights on ancient farming practices near the Chehrabad salt mine in Iran

In the fifth or sixth century A.D., hungry workers in Iran probably грызли on a sheep leg, then бросили their leftovers into the salt mine where they were working.

Some 1,600 years later, researchers performed a DNA analysis of the конечности, peeking into the past and shedding light on an ancient civilization’s sheep животноводство practices. The findings were published last week in the journal Biology Letters.

The mine’s соляная environment naturally mummified the sheep leg, reports Nicoletta Lanese for Live Science. Salt removes water from biological specimens, preserving soft tissues that would otherwise decay due to microbial activity.

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2021-07-26 13:03:24 https://www.smithsonianmag.com/smart-news/researchers-recover-dna-1600-year-old-naturally-mummified-sheep-leg-180978230/ Open / Comment

2021-07-26 13:02:55 Article 17

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