Tag: "slowest" at biology news
Study Of Origin Of Species Enters The Molecular Age
...velopment and cell differentiation,are some of the slowest
evolving genes in all of nature. This means that theyare almost identical in organisms as diverse as worms and monkeys. But when Wulooked at a certain homeobox gene in two sibling species of fruit fly, D.,simulans and D. mauritiana, they were very...
New University of Georgia study indicates possible ancient origin for retroviruses, the class to which HIV belongs
...ranscriptase (an enzyme,remember) domains have the slowest
rate of change among all retroelementproteins, they could look to these areas for clues to the evolutionaryrelationships among retroelements. "We quickly focused on an element we called Cer7, which displays many ofthe features of retroviruses...
Young women with heart disease at risk of 'menstrual angina'
... progesterone are lowest. The best performance and slowest
time to angina pain, of 418 seconds, occurred in mid-cycle, when oestrogen concentrations peak. Sex hormones seem to act as a vasodilator, increasing blood flow through the arteries, say the authors. These hormones can also affect perception of pa...
Healy researchers make a series of striking discoveries about Arctic Ocean
... found evidence that the Gakkel Ridge, the world's slowest
spreading mid-ocean ridge, may be very volcanically active. They also believe that conditions in a field of undersea vents, known as "black smokers," could support previously unknown species of marine life. The findings were among a range of discov...
Facing extreme ice conditions, coast guard, NSF deploy second icebreaker to Antarctica
...idence that the Arctic's Gakkel Ridge, the world's slowest
spreading mid-ocean ridge, may have substantial volcanic activity. NSF concurred with a Coast Guard recommendation to send Healy to assist in icebreaking operations. Coast Guard officials have assured NSF that Healy's Antarctic deployment will not ...
Study suggests humans can speed evolution
...peed up the rate of one of nature's most basic and slowest
processes, evolution? A study by J. Todd Streelman, new assistant professor of biology at the Georgia Institute of Technology suggests that humans may have sped up the evolutionary clock for one species of fish. Cichlid fish are well known to biolog...