Cardinals Can Recognize Gender By Song, Columbia University Biologist Finds
...analysis of both male and femalesongs. Male birds tend to more accurately repeat a single stereotyped "twee,twee, twee," while the female song varies somewhat more, she found. Though bothsongs have the same pitch, the male song is also a purer tone, which may allowit to travel further in the forest; the...Combination Therapy For Brain Tumors Holds Promise For Longer Survival After Surgery
...ell growth. "The mutated oroverexpressed receptors tend to be associated with cancers of the brain,breast, ovary, prostate, and pancreas," explains lead author O'Rourke."There are either more receptors on the cell than normal or the ones thatare there are more active." The researchers are aiming f...French Researchers Breed Flightless Ladybirds As Pest-Killers
... a problem with these biological pest-killers-they tend tofly off before they've finished the job. Now, however, French researchers havepatented a way of breeding ladybirds that can't fly, which ensures that theystay around to eat the pests. Using predators to control pests is widely seen as less ......how symmetrical bodyfeatures, chiefly in the face, tend to be seen as more beautiful thanasymmetrical features. "The traditional explanation," says Ryan, "is that if youhave a genetic disorder, you may not develop correctly," so the asymmetry setsoff a kind of warning signal. "But another possibility is t...New Studies Shed Light On Facial Features Of Popular Dinosaurs
... says. "When we look at a duck-billed dinosaur, we tend tosee an antelope, even though the bone structures of these two animals aredifferent." Many of these comparisons haven't been scrutinized before because theyweren't made using a technique that could be scrutinized, Witmer says. That'sone of t...World's Oldest Known Fossil Reptile Nests Discovered In Arizona's Petrified Forest
...y the inhabitants. Contemporary crocodile mothers tend to stay near theirnests and guard them from predators, while turtles leave their nests immediatelyafter the egg-laying process, said Hasiotis. Some of the fossil nests are located adjacent to each other, saidHasiotis and Martin, who noted tha...Test For Genetic Trait May Indicate Heart Benefits Of Hormone Replacement Therapy
... heart disease. Superko says pattern B women also tend to have defects in the particular type ofHDL that transports LDL away from vessel walls. There are several forms, butonly one type is primarily responsible for removing LDL. Superko says thattriglycerides and other blood fat levels, as well as cho...Heart Inflammation Declining In The United States
...eremay be a resurgence at some point, as the cases tend to follow epidemic as wellas pandemic patterns," says Robert E. McCarthy III, M.D., lead author of thestudy and an assistant professor of medicine at Hopkins. Results of the study will be presented at 1:30 p.m., Nov. 9 at theAmerican Heart ...Vulnerability To Compulsive Gambling Is Partly Inherited
...ve experiences during youth. Those experienceswill tend to be very similar, so with both identical and fraternal twins, we areable to zero in on inherited factors," explains Seth A. Eisen, M.D., principalinvestigator, associate professor of medicine at Washington University School ofMedicine in St. Louis ...Gene Influences How Lifestyle Affects Blood Cholesterol
...people who have inherited one copy of the E-4 form tend tohave higher blood levels of LDL, placing them at greater risk for heart disease. Scientists say that roughly 20 percent of the population carries the E-4 form.Individuals with two copies of (apo)E-3, about 70 percent of the population,tend to have ...Genetic Uniqueness Threatens Florida Manatee's Future
...y to swim large stretches of water, thepopulations tend to stay put because of their dependence on specifichabitat features. The vegetarian animals prefer protected coastal watersand rivers, where seagrasses or fresh water vegetation are abundant, saidBowen, who is supervising Garcia's research. "It's ver...New Forest Owners Prefer Enjoying Their Land Over Working It
...e land for recreation and relaxation. "Today, they tend to be more educated and wealthier and prefer moreenvironmental attributes of their land such as wildlife and recreationrather than just timber production," he said. "They do not seem to havesentimental attachments to their land and are not as knowled...... for scientistsbecause populations of this species tend to be demographically stable undernatural conditions. "The really interesting finding to us was that relatively simple mathematicalequations could be used to predict, qualitatively, the dynamic effects ofcannibalism for this flour beetle species," sa...Native Gray Ants Play Positive Role In Valley Peach Orchards
...fCalifornia Agriculture magazine. "Farmers tend to think of ants exclusively as pests," said UC Be... have a queen that produces eggs, and workers that tend thequeen, care for lavae and forage for food. One food they seek out is thehigh-protein PTB larvae.......e of blue grama's decline are invaders, species we tend to regardas weeds," Alward said. Blue grama, found on the plains of eastern Colorado and surroundingstates (Wyoming, western Kansas and Nebraska, New Mexico and northwest Texas),declines in a distinct relationship to nighttime lows, Detling ...Maternal Anxiety May Affect Fetal Development
...explain why women who are anxious during pregnancy tend to have smaller babies. This is the conclusion drawn by Jernima Teixeira and colleagues from Queen Charlotte's and Chelsea Hospital in their study published in this week's BMJ. In their study of 100 pregnant women the authors found that women who we......the researchers believe that the lung cancer cells tend to metastasizesimply due to the loss of one copy of RRM1, even though the remaining copy isperfectly normal. "It's not whether RRM1 is mutated, it's about balance," Bepler explained. "Twocopies are good; no copies and the cell dies. One copy seems ...Technologies Track, Map Fish Behavior
...discovered the juvenile salmon, also called smolt, tend to work harder as theyapproach the prototype bypass by swimming against the current, toward the bottomof the bypass and parallel to the bypass structure. "This complex behavior could be caused by many factors," Johnson said,"such as noise fro...A Fresh Look At Love And War Between The Sexes
...e to sitting back and acting sweet and shy." Males tend to be mating specialists, Low says, roamers who invest in gettingtheir gametes into a warm, safe place as often as possible. Females areparenting specialists, homers who invest in nurturing and nest-building. But the mating effort that males expend ......ns all bloodwithin the body, adenovirus infections tend to concentrate in that organ, hesaid. Subsequently, as indicated by the blue marker, the modified viruspersisted in the livers of the treated animals for greater than two months. Incontrast, the virus was essentially eliminated within three weeks fro...