HOME >> BIOLOGY >> NEWS
Walking sticks lost wings, then re-evolved them

PROVO, Utah A Brigham Young University researcher has demonstrated that members of a certain group of insects lost the ability to fly and then re-evolved it 50 million years later a conclusion that means the theory of evolution itself must continue to change.

Integrative biology professor Michael F. Whiting and his collaborators analyzed the DNA sequences of 35 species of walking sticks, aptly named insects that mimic twigs to stay hidden from predators, to decipher which evolved first. Their findings, reported in the cover article in the Jan. 16 edition of "Nature," showed that some species of walking sticks without wings existed before their winged descendants, the first time any organism has been shown to do what scientists previously thought impossible re-evolve a complex trait.

"For complex functions like flight or sight, the idea in evolution has always been that organisms either use it or lose it," said Whiting, referring to Dollo's Law, which, as cited in the "Encyclopedia of Evolution," is "the principle that organs or complex structures cannot return to a condition seen in an ancestor."

"This is the first example of a complex feature being lost and recovered much later in an evolutionary lineage," Whiting said. "Even though the wing is not physically there, the underlying genetics which construct wings appear to be conserved over evolutionary time. It suggests that complexity can be maintained over tens of millions of years."

Entomologists have frequently documented cases where species of insects have lost the ability to fly. For example, many insect species that migrate to islands eventually lose wings as an adaptation to keep them from blowing into the sea. Bugs that live on snow don't have wings, and therefore have less surface area and lose less heat.

Whiting reasons that walking sticks lost wings because doing so helped them blend in with their surroundings. He also noted that wingless insects have been
'"/>

Contact: Michael Smart
michael_smart@byu.edu
801-422-7320
Brigham Young University
15-Jan-2003


Page: 1 2 3

Related biology news :

1. Walking aids older womens arterial elasticity, helping heart
2. Walking proteins need to rock and roll, new study finds
3. Walking, Climbing Wheelchair
4. Dipsticks for water testing, right whale future grim, marine law center established

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/14/2017)... (NYSE: IBM ) is introducing several innovative partner startups ... collaboration between startups and global businesses, taking place in ... nine startups will showcase the solutions they have built with ... France is one of the ... percent increase in the number of startups created between 2012 ...
(Date:5/16/2017)... 16, 2017   Bridge Patient Portal , ... MD EMR Systems , an electronic medical ... GE, have established a partnership to build an ... the GE Centricity™ products, including Centricity Practice Solution ... These new integrations will allow healthcare delivery ...
(Date:4/19/2017)... New York , April 19, 2017 ... competitive, as its vendor landscape is marked by the ... the market is however held by five major players ... Safran. Together these companies accounted for nearly 61% of ... of the leading companies in the global military biometrics ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... ... platform specifically designed for life science researchers to analyze and interpret datasets, ... Franklin, who made a major contribution to the discovery of the double-helix ...
(Date:10/11/2017)... ... ... Personal eye wash is a basic first aid supply for any work environment, but most ... you rinse first if a dangerous substance enters both eyes? It’s one less decision, and ... unique dual eye piece. , “Whether its dirt and debris, or an acid or alkali, ...
(Date:10/11/2017)... , Oct. 11, 2017  VMS BioMarketing, a leading ... a nationwide oncology Clinical Nurse Educator (CNE) network, which will ... need for communication among health care professionals to enhance the ... nurses, office staff, and other health care professionals to help ... breast cancer. ...
(Date:10/11/2017)... ... October 11, 2017 , ... ... implantation and pregnancy rates in frozen and fresh in vitro fertilization (IVF) ... and maternal age to IVF success. , After comparing the results from the ...
Breaking Biology Technology:
Cached News: