Tag: "missing" at biology news

Most cave art the work of teens, not shamans

...mantic love, lust, play, graffiti, risk-proneness, missing shields, hour-glass figures, striped horses, seas of grasses, and cold dry winds it's about life on the margins of the Ice Age Mammoth Steppe. Guthrie will present a free public seminar on The Nature of Paleolithic Art, Friday, February 24, at 3:30...

X chromosome dosage compensation proven in germ cells

...led in Drosophila germ cells to compensate for the missing second X chromosome. The study shows that this also occurs in C. elegans and mice somatic cells. In human female somatic cells, one of the two X chromosomes is inactivated to equilibrate expression between the sexes, but this unbalances the expressio...

Sex, cleaner of genomes

...chanism for removing those defects must somehow be missing when sex, too, is missing. The present report supports the notion that it is sex -- or genetic recombination that is a component of sexual reproduction -- which is the purifying force that helps get rid of genetic mishaps that harm the overall evolut...

There's something fishy about human brain evolution

...hropologists are ignorant or dismissive of the key missing link to help answer this question: the metabolic constraints that are critical for healthy human brain development today, and for its evolution. Human brains aren't just comparatively big, they're hungry. The average newborn's brain consumes an amazi...

Science class experiment reveals vitamin B12 secret

...ht up. These stubborn dark spots revealed bacteria missing key genes needed to construct and enter the nodules in plant roots, they discovered. By analyzing various mutations, the researchers were able to track the molecular details of how the bacteria provide the plant with the nutrients it needs to grow. ...

Fossil wood gives vital clues to ancient climates

New research into a missing link in climatology shows that the Earth was not o...as evident that a chunk of about 500,000 years was missing from the terrestrial record. Other records already indicated a drop in sea level, a 2-4C drop in oce...

Ancient DNA helps UF researchers unearth potential hemophilia therapy

...r to finding a safe way to spur production of this missing protein in patients with the most common form of the hereditary bleeding disorder. Using a dormant strand of DNA that has quietly existed in fish for millions of years, the researchers replaced the faulty gene responsible for the disease in neonatal ...

Smallest Triceratops skull ever found provides clues to dinosaur's growth

... assembled them into a skull and lower jaw that is missing only the nose and beak. The fossil has been a unique addition to the world's existing, mostly adult specimens of Triceratops. And the "yearling," as Goodwin called it, fits perfectly into a study he is conducting with Jack Horner of Montana State Uni...

New research shows bats have complex skills to deal with 'clutter'

...utter" of things like leaves and trees could mean missing out on a tasty morsel of dinner altogether. A bat finds its way around with sound rather than sight. Using a sensory process called echolocation, the bat emits ultrasonic pulses that hit objects like leaves, trees, and insects, and bounce back to th...

Worm hormone discovery may aid fight against parasitic disease

...When the researchers provided the mutants with the missing ligand, it prevented the dauer stage, and the anim...s, these glands produce none at all. Replacing the missing hormones through replacement therapy can relieve the symptoms of the disease, much as providing the ...

Locust research suggests that physical state has much to do with learning

...e hairs tend to be more easily stimulated when the missing nutrient is eventually encountered. The strong signal from these hairs pairs with a signal from the smell." "The locust forms an association between the two and a signal is then sent to the brain, where it gets processed," he said. "It seems locusts...

Missing breast cancer genes may soon be discovered

We are closer to finding the missing 80% of breast cancer genes than ever before thanks to the success of the COSMIC database (Catalogue Of Somatic Mutations In Cancer) the 5th European Breast Cancer Conference (EBCC-5) was told today. The genes BRCA1 and BRCA2 account for approximatel...

Novel newborn screening can open door to treating rare but devastating diseases

...th by the age of 5 or 6. The diseases begin when a missing link a deficient enzyme in the lysosome's biochemical chain causes waste material to accumulate in the cell. "It's like the garbage collectors have all gone on strike," Turecek said. "The garbage builds up, the cell struggles and eventually it dies...

Genetics experts join together to support efforts to identify remaining hurricane Katrina victims

...emains to the list of more than 1,100 people still missing in Katrina's wake. Joan Bailey-Wilson, Ph.D., co-...ds normally used to match bodies with names of the missing were destroyed, leaving few clues behind as to whose remains were found. Even DNA-facilitated identi...

Hopkins genetics experts aid efforts to identify hurricane Katrina victims

...families of more than 2,000 people still listed as missing from the disaster. "Both disasters, the attack o...ially thought. That is because many of Katrina's missing victims lost their identifying personal effects in the disaster as well. Items such as toothbrushes...

Major obesity gene is 'lost in the shuffle'

...obase segment of DNA harboring the ASIP gene was missing in gibbons. "We found that this deletion occurred between two pieces of DNA that are quite abundant in primate genomes, called Alu elements," explains Nakayama. "We located one copy of a specific Alu element on either side of the ASIP gene. Our s...

Molecular discoveries aim at advancing early diagnosis of cancers

...ncer-specific splice variant messenger RNA that is missing exon 4. Both the exon-4-minus mRNA and the mature expressed tNOX protein are specific to cancer and remain undetected in cells or sera from healthy volunteers or patients with diseases other than cancer." By harvesting messenger RNA from circulating ...

Newly found species fills evolutionary gap between fish and land animals

... discovered fossils of a species that provides the missing evolutionary link between fish and the first animals that walked out of water onto land about 375 million years ago. The newly found species, Tiktaalik roseae, has a skull, a neck, ribs and parts of the limbs that are similar to four-legged animals k...

Blood pressure medication may revolutionize treatment of Marfan syndrome

... perhaps a more ubiquitous developmental signal is missing from birth. In their fibrillin-1-deficient mice, for example, they found that loss of that critical signal is what caused the lungs to develop improperly. Without that signal, the alveoli -- small air sacs in the lungs -- do not form normally, leadin...

Lunar rocks suggest meteorite shower

...bout the early history of our solar system that is missing from the Earth's geologic record."...

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