frogs

Spiders, frogs and gecko among exciting discoveries found in Papua New Guinea

Arlington, Virginia Jumping spiders, a tiny chirping frog and an elegant striped gecko are among 56 species believed new to science discovered during a Conservation International (CI) Rapid Assessment Program (RAP) expedition to Papua New Guinea's highlands wilderness. The discoveries were ann...

Brain Tumor Drug in Frogs A New Report

A synthetic version of a molecule found in the egg cells of the Northern Leopard frog (Rana pipiens) could provide the world with the first drug treatment for brain tumours. The molecule Amphinase,recognises the sugary coating found on a tumour cell and binds to its surface before invading th...

Jamaican Destination Spa Offers More Than Just a Magical Experience for the Body, Mind and Spirit

... steps up the hill to the Peppermint Restaurant, where scrumptious Jamaican meals are served. Come nightfall, another treat is in store: The crickets, frogs and other nocturnal creatures put on a choral recital that is out of this world. What about the magic? Besides the environment and being treated ...

Korein Tillery Takes Herbicide Atrazine Case to the Court of Public Opinion

... the effects of Atrazine on the sex organs of male frogs are occurring at levels as low as 0.1 parts per bi... is a teratogen, causing demasculinization in male frogs and is an estrogen disruptor. Dr. Hayes explains, "In frogs and humans, the hormones are the same, the mechani...

Ten new amphibian species discovered in Colombia

...kinned, orange-legged rain frog, three poison dart frogs and three glass frogs, so called because their tra...ally new species of amphibians include three glass frogs of the Nymphargus, Cochranella and Centrolene genus; three poison dart frogs of the Dendrobatidae family (Colostethus, Ranitome...

Skin color studies on tadpoles lead to cancer advance

...physiology. This means that the same mechanisms are involved in causing cancer in both Xenopus tadpoles and humans. Until the 1960s, Xenopus Laevis frogs were used as the main human pregnancy test. A woman's urine sample was injected into a live frog. If the urine contained the hCG (human chrionic gonad...

'Hub' of fear memory formation identified in brain cells

...trap, fastening cells' internal skeletons to proteins on their external membranes that connect them with other cells. In species ranging from flies to frogs to mice, it also can transmit early signals that separate an embryo into front and back or top and bottom. During long-term memory formation, stru...

Pedophiles Thrive on Parental Trust

...dy guide to help parents discuss the issues raised in the videos with their children. Once, after viewing one of Mitchell's films featuring two puppet frogs named What and Tadoo, a four-year-old girl who'd blown the whistle on her abuser was questioned by a district attorney and asked how she knew what to ...

Bright Starts(TM) Adds New Twist to Old Favorites

...ht Starts safe, nontoxic Polar Gel(TM) formula. Plus it's freezer-safe for extra soothing comfort. -- Pond Poppers(TM) -- Fun, pond-themed top spins frogs and turtles above while fish and turtle "swim" below. Contrasting colors promote visual development, while pressing the handle promotes fine motor ski...

Heart's Stem Cells Not Created Equally

...nal, a discovery that could lead to future treatments for congenital heart disease and heart attacks, U.S researchers say. Experiments conducted on frogs challenge long-held beliefs that the stem cells that eventually develop into the heart's muscle tissue do so in reaction to the same cue. "Not onl...

frogs in Biological News

Disease threat may change how frogs mate

Dr Amber Teacher, studying a post-doctorate at Royal Holloway, University of London, has discovered evidence that a disease may be causing a behavioural change in frogs. The research, published in the August edition of Molecular Ecology, has unearthed a surprising fact about our long-tongued fri...

Stanford researchers: Global warming is killing frogs and salamanders in Yellowstone Park

Frogs and salamanders, those amphibious bellwethers of environmental danger, are being killed in Yellowstone National Park. The predator, Stanford researchers say, is global warming. Biology graduate student Sarah McMenamin spent three summers in a remote area of the park searching for frogs an...

Dying frogs sign of a biodiversity crisis

BERKELEY Devastating declines of amphibian species around the world are a sign of a biodiversity disaster larger than just frogs, salamanders and their ilk, according to researchers from the University of California, Berkeley. In an article published online this week in the journal Proceeding...

Ultrasonic frogs can tune their ears to different frequencies

Researchers have discovered that a frog that lives near noisy springs in central China can tune its ears to different sound frequencies, much like the tuner on a radio can shift from one frequency to another. It is the only known example of an animal that can actively select what frequencies it he...

When threatened, a few African frogs can morph toes into claws

CAMBRIDGE, Mass., June 23, 2008 Biologists at Harvard University have determined that some African frogs carry concealed weapons: When threatened, these species puncture their own skin with sharp bones in their toes, using the bones as claws capable of wounding predators. The unusual defense m...

Female concave-eared frogs draw mates with ultrasonic calls

Most female frogs dont call; most lack or have only rudimentary vocal cords. A typical female selects a mate from a chorus of males and then silently signals her beau. But the female concave-eared torrent frog, Odorrana tormota, has a more direct method of declaring her interest: She emits a high...

Indigenous water frogs under threat

Angers/Leipzig. Indigenous water frogs can be crowded out by immigrant or imported species. This is the finding of a Franco-German study. The scientists investigated water frog populations in France and Northern Spain and noticed that the marsh frog (Rana ridibunda), which normally occurs only in ...

UCLA scientists discover ultrasonic communication among frogs

UCLA scientists report for the first time on the only known frog species that can communicate using purely ultrasonic calls, whose frequencies are too high to be heard by humans. Known as Huia cavitympanum , the frog lives only on the Southeast Asian island of Borneo. Ultrasounds are high-p...

Caribbean frogs started with a single, ancient voyage on a raft from South America

Red frog from mountains of Haiti. Eleutherodactylus audanti , from Massif de la Selle. Nearly all of the 162 land-breeding frog species on Caribbean islands, including the coqui frogs of Puerto Rico, originated from a single frog species that rafted on a sea voyage from South America about 3...

Study shows frogs can play key role in stem cell research

It sounds like one of those curiosities which pops up in wildlife documentaries, but the African clawed frog could prove a powerful ally for scientists working in the key area of stem cell research. Researchers at the University of Edinburgh have discovered that the distinctive species ?which has b...

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frogs in Biological Technology

Fighting spam via blue frogs

Some companies just can't wait for DEMOfall, and one of those is Blue Security , which launched the public beta of its Blue Frog "Do Not Intrude Registry" early last week. The concept is like the national Do Not Call list that has deterred telemarketers from ruining your dinner. Instead of th...

Beyond associations: Colorectal cancer culprit found

...ctal cancer, and found that it resides in a DNA sequence that is conserved in many other species so well conserved that they were able to use xenopus frogs as a model organism to test the biological consequences of this SNP. The group found that the SNP causes the expression of a nearby gene, called SMA...

Cells Exhibition Opens at Maryland Science Center

...in a giant, interactive video. In Cells and the Miracle of Life, guests explore the roles cells play in the life cycles of various animals by studying frogs in various stages of life, and using a microscope to compare and contrast the cells of diseased and non-diseased samples of the human lungs and heart....

frogs in Biological Definition

Albinism

...fur and blue eyes. A high percentage of albino cats are also deaf. Albino frogs and fish are found in the wild, and can sometimes be found for sale in pet ... like wool, as white as snow, and His eyes like a flame of fire* Albino frogs Albino Tiger Barb Albino Corydorus paleatus ...

Carnivore

... and falcons Owls Scavenger birds, like vultures Several species of waterfowl including gulls , penguins , pelicans and storks frogs Snakes Crocodilians Sharks and many other species of fish Toothed whales Octopuses and squid Spiders Mantophasmatodea ...

Cell growth

...s from adjacent cells through cytoplasmic bridges ( Drosophila ) or by internalization of nutrient storage granules (yolk granules) by endocytosis ( frogs ). Increases in the size of plant cells is complicated by the fact that almost all plant cells are inside of a solid cell wall . Under the influe...

Cloning

...loned The modern cloning techniques involving nuclear transfers have been successfully performed on several species: (in chronological order) frogs : (1962) Unsuccessful carp : (1963) Successfully cloned sheep : (1996) Dolly rhesus monkey : Tetra (female, January 2000) pig : 5 ...

Developmental biology

...l organisms in developmental biology include the following: Chordates Lancelet Branchiostoma lanceolatum Zebrafish Danio rerio frogs Xenopus laevis Chicken Gallus gallus Mouse Mus musculus ( Mammalian embryogenesis ) Invertebrates Sea urchin Round w...

Cold-blooded

..., more complex genomes than homeotherms in the same ecological niche . frogs are a notable example of this effect. Because their metabolism is so var...c animals. In these niches, poikilotherms such as large lizards, crabs and frogs supplant homeotherms such as birds and mammals. ...

Lung

... are thus equipped to fly at altitudes at which mammals would succumb to hypoxia . Reptilian lungs Amphibian lungs The lungs of most frogs and other amphibians are simple balloon-like structures, with gas exchange limited to the outer surface area of the lung. This is not a very effici...

Osmoregulation

...ored in the urinary bladder and exits via the urethra; in other vertebrates the urine mixes with other wastes in the cloaca before leaving the body; ( frogs also have a large penis). References E. Solomon, L. Berg, D. Martin, Biology 6th edition. Brooks/Cole Publishing. 2002 ...

frogs in Biological Dictionary

Xenopus

... Xenopus is a genus of highly aquatic frogs native to Sub-Saharan Africa. There are 18 specie...nus. They are known collectively as African Clawed frogs or Platanna. The best-known species belonging to...pus n. Any of various aquatic, tongueless, clawed frogs of the genus Xenopus , native to southern ... ...

Wild-type

...ms serve as the original ... ... laevis laevis - Imported wild type (pigmented) Our Imported wild type Xenopus laevis are very ... Lab bred frogs never are exposed to the same rigid standards ... wild type - The most frequent allele or genotype found in nature, or a specified ... Scie...

Wildtype

...topic wild-type are discussed in the following places at Britannica. ... Our Imported wild type Xenopus laevis are very hardy animals. Lab bred frogs never are exposed to the same rigid standards and tests as in nature. ... ...

Nerve chord

...re spot. touch at some place. touch base. touch down. touch for ... 2. A dorsal, hollow nerve chord present at some time in its life cycle. ... frogs and toads poses vocal chords . 7. Brain with ten pairs of cranial nerves . ... Dorsal nerve chord . Pharyngeal pouches. Post-anal tail. Cephal...

Digit

...git (noun) double- digit (adjective) significant digit (noun) Main Entry: dig·it ... Creationists claim that digit development in birds and frogs rules out evolution. ... The first piece of evidence against evolution is the old avian digit problem. ... Determine the check digit for barc...

Convergent evolution

...onvergent evolution is the process whereby organisms ... It uses material from the article Convergent evolution at Wikipedia.org. ... Poison frogs and ants display convergent evolution . ... Convergent Evolution in Poison Frogs. By Bjorn Carey, LiveScience Staff Writer ... Convergent ...