’Odd Little Creature’ Skips Sex and Eats DNA
2012 12 03

From: LiveScience

The tiny, all-female bdelloid rotifers have endured the past 80 million years without sex. New research shows that gobbling up foreign DNA from other simple life-forms might be the asexual animal’s secret to survival.

In the study, scientists discovered that up to 10 percent of the active genes in microscopic bdelloids comes from bacteria and other organisms like fungi and algae. The finding adds to "the weirdness of an already odd little creature," said Alan Tunnacliffe, a University of Cambridge professor and lead author of the study.


A pair of bdelloids probably don’t get excited about each other as two humans in such close proximity might. Bdelloids don’t need sex to reproduce.


"We don’t know how the gene transfer occurs, but it almost certainly involves ingesting DNA in organic debris, which their environments are full of," Tunnacliffe explained in a statement. "Bdelloids will eat anything smaller than their heads!"

Many asexual creatures are thought to be doomed to extinction due to the lack of genetic diversity and build-up of mutations that often come with reproducing from just one parent’s DNA. But bdelloids have managed to avoid such pitfalls of asexual life, diversifying into at least 400 species.

One of the critters’ more remarkable qualities is their ability to withstand extreme dehydration, which could be, in part, thanks to the alien DNA. The new study found that some of the foreign genes are activated when the bdelloids begin to dry out in their ephemeral aquatic homes. These genes also might be behind powerful antioxidants thought to protect bdelloids from the by-products of drying out.

"These antioxidants have not yet been identified, but we think that some of them result from foreign genes," Tunnacliffe added.

Bdelloids’ success could also be attributed to their potent DNA repair mechanisms, which seem to have evolved thanks to a duplicate set of genes, according to research detailed in 2008 in the journal Proceedings of the National Academy of Sciences.

The new findings were detailed in the journal PLoS Genetics Thursday (Nov. 15).


Article from: yahoo.com







Related Articles


Latest News from our Front Page

’Hammer of Thor’ unearthed: Runes on 1,000-year-old amulet solve mystery of why Viking charms were worn for protection
2014 08 21
In Norse mythology, Thor’s hammer helped prevent giants from destroying Asgard, the celestial home of the gods. Thousands of tiny intricate amulets, similar to this weapon, have been found all over the Viking world since the first millennium CE. But for years, researchers have been unsure whether the amulets, known as ’torshammere’, were a representation of Thor’s hammer or something else entirely. Researchers ...
Mass Produced Security Robots Introduced in U.S.
2014 08 20
While debate continues to rage about the threat of autonomous "killer robots," the mechanized replacement of humans continues across the workforce. In fact, the robotics industry notched record sales in the first half of 2014 in North America, and there appears to be no indications of a slowdown. Security robots have become a special area of interest for developers. Britain ...
Is Michael Brown A National Hero?
2014 08 19
From: Brother Nathanael: I don’t know about you but I revolt against crowning Michael Brown a “national hero.” Better the crown go to Darren Wilson who according to the Ferguson Police Report shot Brown in self-defense. Yet there’s already a bounty on his head. And the media eats it up. For whether it’s NBC; CNN …or the New York Times; the spin is that ...
Toxoplasmosis – The Revealing Behavior and Effects of Parasites
2014 08 19
A fascinating interview with neurobiologist Robert Sapolsky on toxoplasmosis and the behavior of a seemingly intelligent parasite. The parallels to archonic-type influences are astounding. A must see. From: zengardner.com For context, please listen to John Lash on White Genocide & The Archontic Infection
Emmy Awards 2014 - Spoilers! Leaked Clip for Best Psychopath!!
2014 08 19
WARNING SPOILER ALERT!!! Leaked clip from the 66th Annual Emmy Awards scheduled to air August 25th, 2014. Winner announced for best Psychopath of the year! Video from: youtube.com Can’t get enough of those warm Zionist in Hollywood. Joan Rivers: "Palestinians deserve to be dead"
More News »