’Odd Little Creature’ Skips Sex and Eats DNA
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
Latest News from our Front Page
The Truth About Starbucks New Coconut Milk: It Isn’t Really Coconut Milk
In an attempt to appeal to the non-dairy crowd, Starbucks is bringing “coconut milk” to the masses. After a successful trial run in select cities at the behest of their customers, Starbucks has decided to push forward with their dairy alternative.
Providing a non-dairy alternative to dairy and soy is the second most requested customer idea of all time from MyStarbucksIdea.com, ...
USDA on board with shipping U.S. chickens to China for processing, then re-entry to States for human consumption
“Chinese chicken” will soon have a whole new meaning, as the U.S. Department of Agriculture recently gave the green-light to four chicken processing plants in China, allowing chicken raised and slaughtered in the U.S. to be exported to China for processing, and then shipped back to the U.S. and sold on grocery shelves here. Furthermore, the imported processed ...
Feinstein: Netanyahu does not speak for all Jews
US Senator Dianne Feinstein, chair of the Senate Select Committee on Intelligence, has denounced Israeli Prime Minister Benjamin Netanyahu as an “arrogant” man who does not speak for all Jews.
The Jewish lawmaker made the remarks in an interview with CNN on Sunday ahead of Netanyahu's controversial visit to the United States.
The Israeli premier arrived in Washington, DC, on Sunday night ...
Netanyahu to US: Don’t negotiate ‘bad deal’ with Iran
Israeli Prime Minister Benjamin Netanyahu has called on the United States not to negotiate “a very bad deal” with Iran over its nuclear energy program.
Speaking at a joint session of the US Congress in Washington, DC, on Tuesday, Netanyahu said, “We’ve been told for over a year that no deal is better than a bad deal. Well this is a ...
School Textbook: “There’s No Such Thing as Reverse Racism” Only White People can be Racist
Only white people can be racist.
A school textbook teaches students that “there is no such thing as reverse racism” and that women can never be as sexist as men.
The passage, which appears to be taken from a “multicultural education series” book entitled Is Everyone Equal, states, “STOP: There is no such thing as reverse racism or reverse sexism (or the ...
|More News » |