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Tag: "vertebrate" at biology news

Study: Predatory dinosaurs had bird-like pulmonary system

...he most efficient respiratory system of any living vertebrate inhabiting the land or sky," said Claessens, who received a Ph.D. from Harvard in organismic and evolutionary biology last month and will join the faculty at the College of the Holy Cross in Worcester, Mass., this fall. In birds, this special anatom...

Insight into our sight: A new view on the evolution of the eye lens

... physiologically remarkable structures such as the vertebrate eye has long been a focus of intrigue and theorizi...ognized relationship between certain components of vertebrate eyes and those of the more primitive light-sensing systems of invertebrates. The findings help clari...

K-State professors discover enzyme responsible for creation of a beetle's hard shell

...sect development, but absent from humans and other vertebrate animals, such as cuticle tanning, may be useful for developing new, bio-rational methods for controlling pest insect populations," Kanost said. Armed with this new information, a number of practical applications are possible. Materials based on the ...

Leading lampreys to slaughter: Pheromone for scourge of Great Lakes identified

... 2. The lamprey is one of the earliest relics of vertebrate evolution, dating back nearly 400 million years, before the evolution of jaws and bony skeletons. The species parasitizes other fish by attaching with their circular, toothy mouths and sucking the body juices. A single lamprey will feed for about a y...

Jefferson scientists identify gene defect leading to abnormal skin development and cancer

... 2. The lamprey is one of the earliest relics of vertebrate evolution, dating back nearly 400 million years, before the evolution of jaws and bony skeletons. The species parasitizes other fish by attaching with their circular, toothy mouths and sucking the body juices. A single lamprey will feed for about a y...

Marsupial genome reveals insights into mammalian evolution

...me genomes comes from their important positions in vertebrate evolution," says Belov. (Monotremes are egg-laying mammals, represented today by only the platypus and echidna.) "Comparing genes of placental mammals, such as the human and the mouse, is not very efficient because their genes can be so similar it ...

Frog’s ear canal may provide insights for understanding human hearing loss

...ave-eared torrent frog, is the first non mammalian vertebrate found to be capable of producing and detecting ultrasounds for communication, much like dolphins, bats and some rodents. It does so, the researchers report, to make itself heard above the din of low-frequency sounds produced in its surroundings so th...

UF scientists reveal ancient origin of vertebrate skeleton

...ught collagen was a relatively recent invention in vertebrate evolution that unites us with reptiles, amphibians...s have to dig beyond bone and cartilage to unravel vertebrate relationships, according to Michael Caldwell, Ph.D., an associate professor of earth and atmospheric...

UF scientists reveal ancient origin of vertebrate skeleton

...ught collagen was a relatively recent invention in vertebrate evolution that unites us with reptiles, amphibians...s have to dig beyond bone and cartilage to unravel vertebrate relationships, according to Michael Caldwell, Ph.D., an associate professor of earth and atmospheric...

Sexual reproduction delays aging in a mammalian species

... the University of Duisburg-Essen shows that, in a vertebrate species, the opposite can be true as well. The authors, studying captive Zambian mole-rats (Cryptomys anselli), analyzed breeding data gathered over the course of more than 20 years. These subterranean, almost-blind, hamster-sized rodents are among ...

Junk DNA may not be so junky after all

... compared to mice or rats. "Zebrafish are the only vertebrate embryo you can even think about doing this type of work in," says Shannon Fisher, M.D., Ph.D., the study's first author and an assistant professor in cell biology in Johns Hopkins' Institute for Basic Biomedical Sciences. The researchers' next step...

Infused spleen cells found not to impact islet recovery and reversal of type 1 diabetes in mice

... compared to mice or rats. "Zebrafish are the only vertebrate embryo you can even think about doing this type of work in," says Shannon Fisher, M.D., Ph.D., the study's first author and an assistant professor in cell biology in Johns Hopkins' Institute for Basic Biomedical Sciences. The researchers' next step...

How the octopus forms an elbow

...es, the octopus arm acts much like a three-jointed vertebrate limb when the octopus performs precise point-to-po...ategies in articulated limbs (for example, jointed vertebrate arms) and flexible octopus arms suggests that these qualities have evolved convergently in octopuses...

FSU biologist says new dinosaur is oldest cousin of Tyrannosaurus rex

...own expert on the development and evolution of the vertebrate musculoskeletal system, Erickson helped confirm th...diles. He is an assistant professor of anatomy and vertebrate paleobiology at FSU; curator of the Florida State University Museum; and a research associate at bot...

Relationship of brain and skull more than just packaging

...t for the changes observed in the evolution of the vertebrate skull. The researchers include Richtsmeier; Aldridge; Valerie B. DeLeon and Jayesh Panchal, The Johns Hopkins School of Medicine; Alex A. Kane, Johns Hopkins and Washington University School of Medicine; Jeffrey L. Marsh, St. John's Mercy Medical C...

Invasive exotic plants helped by natural enemies

...ects commonly reduce plant growth and biomass, but vertebrate herbivores are often larger and thus more commonly kill plants outright. Because of this, vertebrate herbivores often have a stronger impact on plant communities. The study's findings have serious imp...

UF scientists trace origin of shark's electric sense

...identifies neural crest cells, which are common in vertebrate development, as a source of sharks' electrical ESP...cells is valuable for people trying to reconstruct vertebrate evolution. It gives us further indication of how all of the various sensory systems come on line." ...

Resveratrol prolongs lifespan and delays onset of aging-related traits in a short-lived vertebrate

...ertebrate organisms can also do so in at least one vertebrate species. The findings, reported by Alessandro Cellerino of the Scuola Normale Superiore, Pisa, and colleagues, support the potential utility of the compound in human aging research. The development of drugs able to retard the onset of aging-related ...

Brittlestar provides new model for stem cell research

...avoid the ethical issues associated with human and vertebrate research. The brittlestar, Amphiura filiformis, is a close relative of the starfish and can regenerate lost arms in a matter of weeks. Sam Dupont and Mike Thorndyke are presenting their latest work on Friday 7th April at the Annual Meeting for the ...

Study fishes out new role for prostaglandins

...sor of Biological Sciences. Early in development, vertebrate embryos consist of one layer of cells. These simple embryos must go through a complex reorganization called gastrulation to establish the three primitive layers from which all adult tissues develop ?the innermost layer (endoderm), which forms the gut...

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