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Ensayos sobre la evolución biológica
Autor: Antonio Barbadilla
Universitat Autònoma de Barcelona

 

 

Science Daily:
Evolutionary Biology  News




Evolutionary Biology
Recent Headlines

Headline (Posted) Abstract
Using genomics to determine origins of deadly White-Nose Syndrome (12 Dec 2017) A new study is trying to definitively answer several questions about White-Nose Syndrome in bats: where did this fungus come from? And more importantly, can a resistance be evolved?

Native fish species at risk following water removal from the Colorado River (12 Dec 2017)
Agriculture and domestic activities consume much of the Colorado River water that once flowed to the Colorado Delta and Northern Gulf of California. The nature and extent of impact of this fresh-water loss on the ecology and fisheries of the Colorado Delta and Gulf of California is controversial. A recent publication reveals a previously unseen ris [+]


It's all in the ears: Inner ears of extinct sea monsters mirror those of today's animals (07 Dec 2017) A new study has revealed that an extinct group of marine reptiles called sauropterygians evolved similar inner ear proportions to those of some modern day aquatic reptiles and mammals.

Separated since the dinosaurs, bamboo-eating lemurs, pandas share common gut microbes (06 Dec 2017) A new study finds that bamboo lemurs, giant pandas and red pandas share 48 gut microbes in common -- despite the fact that they are separated by millions of years of evolution.

Viruses share genes with organisms across the tree of life, study finds (06 Dec 2017) A new study finds that viruses share some genes exclusively with cells that are not their hosts. The study adds to the evidence that viruses swap genes with a variety of cellular organisms and are agents of diversity, researchers say.

Recently discovered fossil shows transition of a reptile from life on land to life in the sea (06 Dec 2017) Using modern research tools on a 155-million-year-old reptile fossil, scientists report they have filled in some important clues to the evolution of animals that once roamed land and transitioned to life in the water.

Cooling climate drove evolution of Tasmanian Devil and its relatives (05 Dec 2017) A big drop in global temperatures 12-14 million years ago may explain the evolutionary success of Australia's unique marsupial carnivores, a new study has found.

Variation within species is critical aspect of biodiversity (05 Dec 2017) Concerns about biodiversity tend to focus on the loss of species from ecosystems, but a new study suggests that the loss of variation within species can also have important ecological consequences.

Early avian evolution: The Archaeopteryx that wasn‘t (04 Dec 2017) Paleontologists have corrected a case of misinterpretation: The first fossil "Archaeopteryx" to be discovered is actually a predatory dinosaur belonging to the anchiornithid family, which was previously known only from finds made in China.

Worm genomes reveal a link between ourselves and our distant relatives (04 Dec 2017) Researchers have decoded two worm genomes and found that they have several genetic similarities with the vertebrates.

Genes identified that distinguish mammals from other animals (04 Dec 2017)
What distinguishes Homo sapiens from other living beings? And the group of mammals? What makes them different? Researchers analysed the already-sequenced genomes of 68 mammals and identified 6,000 families of genes that are only found in these animals. These are genes with no homologues outside mammals, in other words, they are not present in other [+]


Beetles' bright colors used for camouflage instead of warning off predators (04 Dec 2017) Biologists have discovered that the bright color patterns of beetles are not a warning signal to predators as previously believed, but actually a form of camouflage, turning an old assumption on its head.

Surprise in the kangaroo family tree (04 Dec 2017)
Ironically, it is jumping genes that indicate the need for a reorganization of the kangaroos' phylogenetic tree. According to a new study, the swamp wallaby is more closely related to the remaining wallaby species and the large red and grey kangaroos and wallaroos than previously assumed. This study was the first to examine the relationships within [+]


New gene-based model suggests, for microbes, it's not who you are but what you do (04 Dec 2017) A new model simulates the impact of microbial activities on the chemistry in the North Atlantic and suggests that the evolution of a metabolic function rather than the evolution of an individual species shapes the ocean as we know it. It is the first model that actually predicts genes and transcription throughout the ocean.

Bottle gourd genome provides insight on evolutionary history, relationships of cucurbits (01 Dec 2017) Researchers have produced the first high-quality genome sequence for the bottle gourd (Lagenaria siceraria) and a reconstructed genome of the most recent Cucurbitaceae ancestor.

Drought-resistant plant genes could accelerate evolution of water-use efficient crops (01 Dec 2017) Scientists have identified a common set of genes that enable different drought-resistant plants to survive in semi-arid conditions, which could play a significant role in bioengineering and creating energy crops that are tolerant to water deficits.

Bat cave study sheds new light on origin of SARS virus (30 Nov 2017) Genetic recombination between viral strains in bats may have produced the direct evolutionary ancestor of the strain that caused a deadly outbreak of severe acute respiratory syndrome (SARS) in humans, according to new research.

Humble sponges are our deepest ancestors: Dispute in evolutionary biology solved (30 Nov 2017) New research has resolved evolutionary biology's most-heated debate, revealing it is the morphologically simple sponges, rather than the anatomically complex comb jellies, which represent the oldest lineage of living animals.

Single-molecule DNA sequencing advances could enable faster, more cost-effective genetic screening (29 Nov 2017) Researchers are developing new techniques for faster, more cost-effective single-molecule DNA sequencing that could have transformative impacts on genetic screening.

Big data tool begins new era for biology and personalized medicine (29 Nov 2017) Researchers have developed a novel series of systems genetics tools to identify new links between genes and phenotypes. The work brings biology to the cloud and sets the stage for the development of precision medicine.

Largest genetic study of mosquitoes reveals spread of insecticide resistance across Africa (29 Nov 2017) The largest ever genetic study of mosquitoes reveals the movement of insecticide resistance between different regions of Africa and finds several rapidly evolving insecticide resistance genes. Malaria is transmitted by mosquitoes and rising resistance to insecticides is hampering efforts to control the disease.

Theory of the evolution of sexes tested with algae (29 Nov 2017) The varied sex lives of a type of green algae have enabled a researcher to test a theory of why there are males and females.

Abominable Snowman? Nope: Study ties DNA samples from purported Yetis to Asian bears (28 Nov 2017) The Yeti or Abominable Snowman -- a mysterious, ape-like creature said to inhabit the high mountains of Asia -- looms large in the mythology of Nepal and Tibet. Now, a new DNA study of purported Yeti samples from museums and private collections is providing insight into the origins of this Himalayan legend.

In populations of microbes, bioengineers find a balance of opposing genomic forces (28 Nov 2017) Recent study examines the dynamics that govern the genomic diversity of microbes by modeling the effects of several different factors on evolution of the genome sequence.

A horse is a horse, of course, of course -- except when it isn't (28 Nov 2017)
Scientists have discovered a previously unrecognized genus of extinct horses that roamed North America during the last ice age. The new findings are based on an analysis of ancient DNA from fossils of the enigmatic 'New World stilt-legged horse' excavated from sites such as Natural Trap Cave in Wyoming, Gypsum Cave in Nevada, and the Klondike goldf [+]


Sharks evolved aircraft-like attributes to suit habitats (27 Nov 2017) Researchers report that shark species have evolved diverse physical attributes to help them thrive in different ocean ecosystems.

As climate warms, mice morph (27 Nov 2017)
Milder winters have led to physical alterations in two species of mice in southern Quebec in the past 50 years -- providing a textbook example of the consequences of climate change for small mammals. These findings also reveal a stark reversal in the proportions of the two mice populations present in the area, adding to evidence that warming temper [+]


When physics gives evolution a leg up by breaking one (27 Nov 2017) With no biological program to drive it, nascent multicellular clusters adopt a lifecycle thanks to the physics of their stresses. The accidental reproduction drives them to evolve as multicellular life.

Common cold viruses reveal one of their strengths (27 Nov 2017)
Why don't we ever develop immunity against the common cold? The incredible variability of coronaviruses is better understood with this study about the ways in which coronaviruses adapt and evolve, becoming ever more effective at infecting hosts without being defeated by the immune system. The receptor binding domain (RBD) of coronavirus S-protein d [+]


New butterfly species discovered in Russia with an unusual set of 46 chromosomes (27 Nov 2017)
Finding a new species is a rare event in easy-to-see and well-studied organisms like butterflies, especially if they inhabit well-explored areas such as Europe. Researchers have now discovered the previously unknown South-Russian blue using an array of modern research techniques. Furthermore, the new species was found to possess 46 chromosomes, jus [+]


150 years of snake collections: Data bank proves rich snake diversity in the neotropics (24 Nov 2017)
An extensive database constructed for snakes of the American tropics has now been released by researchers. This database is made up of museum collections from the past 150 years and demonstrates that some Neotropical regions, such as the Cerrado in the central Brazil, contain a disproportionately high diversity. Furthermore, some other diverse regi [+]


World's smallest tape recorder is built from microbes (24 Nov 2017) Through a few clever molecular hacks, researchers have converted a natural bacterial immune system into a microscopic data recorder, laying the groundwork for a new class of technologies that use bacterial cells for everything from disease diagnosis to environmental monitoring.

New species can develop in as little as two generations, Galapagos study finds (24 Nov 2017) A study of Darwin's finches, which live on the Galapagos Islands in the Pacific Ocean, has revealed direct genetic evidence that new species can arise in just two generations.

Genome of Leishmania reveals how this parasite adapts to environmental changes (22 Nov 2017) Scientists demonstrate that Leishmania adaptation results from frequent and reversible chromosomal amplifications. This novel insight into Leishmania genomic instability should pave the way for the identification of parasite drug resistance mechanisms and help discover biomarkers.

Growing teeth and a backbone: Studies trace early origins of skeletal tissues (22 Nov 2017) Two new studies on the evolutionary origin of teeth and of vertebra further illuminate the human connection to marine organisms that goes back millions of years. Both studies were conducted in the little skate (Leucoraja erinacea).

Twisted sex allows mirror-image snails to mate face-to-face, research finds (21 Nov 2017) A new study has found that differently-coiled types of Japanese land snails should in fact be considered a single species, because -- against all odds -- they are sometimes able to mate, a result which has implications for the classification of other snails.

Ancient fish scales and vertebrate teeth share an embryonic origin (20 Nov 2017) Latest findings support the theory that teeth in the animal kingdom evolved from the jagged scales of ancient fish, the remnants of which can be seen today embedded in the skin of sharks and skate.

Genome sequencing reveals extensive inbreeding in Scandinavian wolves (20 Nov 2017) Researchers have for the first time determined the full genetic consequences of intense inbreeding in a threatened species.

Bryozoans: Fossil fills missing evolutionary link (16 Nov 2017) Scientists recently announced the discovery of a missing evolutionary link -- a fossil of the first known member of the modern bryozoans to grow up into a structure.

How Snapdragons keep their color: Signposting trick reveals evolutionary mechanism (16 Nov 2017) A study of the colour patterns among wild flowers in a mountain valley has yielded a clue about how nature controls fundamental evolutionary change in all species.