Cardinals Can Recognize Gender By Song, Columbia University Biologist Finds
...hides them fromview, their songs might provide the cue that alerts a bird to the presence ofanother bird. She hid speakers in the brush at a field site in Arizona, and when sheplayed back male songs, male cardinals attacked the location of the speaker;when she played back female songs, females re...Simple Chemical Switch Steers Migrating Neurons
...San Diego (UCSD), has found that a single chemical cue caneither attract or repel, depending on the growt...response of a growth cone to a particular guidance cue maydepend critically on other signals received by the neuron. Thesusceptibility to conversion betwee...Temperature may be a key cue for setting the biological clocks that govern the ...erature rather than visible light was the dominant cue for resetting the cellular timekeepers. The work is supported by the National Institutes of Health (...Diabetes Drug And Accutane Block Breast Cancer Cell Growth, Cedars-Sinai Researchers Find
... compound Accutane stopped multiplying and died on cue inlaboratory and animal studies conducted at Cedars-Sinai Medical Center,researchers reported today in the journal Proceedings of the National Academy ofScience. Troglitazone, an antidiabetes drug, and Accutane, a Vitamin A compound used tot...Relapsing Fever Spirochete Switches Surface Proteins When It Changes Hosts
...sts discovered, can trigger thechange. "One likely cue that promotes this switch is the drop in temperaturethat occurs when the spirochete moves from a warm-blooded animal to a tick," Dr.Schwan notes. Their observations of Borrelia hermsii, the spirochete that causes relapsingfever, can be extended to ot...Research Into Cockroach Behavior Could Lead To Better Baits
...ver seem to go hungry, so she theorized a chemical cue might guide their forays into the kitchens of the world. Researchers already knew roaches emit a sex pheromone that helps them find mates and an aggregation pheromone that helps them find safe haven. Miller thought roaches might also use pheromones i......etic switch when they hit asurface, which is their cue to form a biofilm. When they break away from thecolony they undergo another biochemical change and revert back to theplanktonic, free floating type. "But there still was one unanswerable question: How could they have sucha complex [biofilm] ...