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Tag: "diversification" at biology news

Researchers identify gene involved in dog size

...ize that small size may have facilitated the rapid diversification among domestic dog breeds by making it easier for humans to maintain them in the crowded confines of developing villages and cities, as well as making them more transportable during trade and migration. Future aims of the study are to identify gen...

Prehistoric origins of stomach ulcers uncovered

...t also offers a new way to study the migration and diversification of early humans. The international research collaboration was led by scientists from the University of Cambridge, the Max Planck Institute in Berlin, and the Hanover Medical School. The researchers compared DNA sequence patterns of humans and the H...

UBC researchers reveal dwarf aquatic plants' hidden ancestry

...g together the details of the rapid rise and early diversification of flowering plants," says Graham. "Discovering this living plant’s ancient heritage makes us re-evaluate our understanding of early flowering-plant evolution. For botanists, this is like finding something you thought was a lizard is actually a livin...

Dinosaur extinction didn't cause the rise of present-day mammals, claim researchers

..., certain mammals did experience a rapid period of diversification and evolution. However, most of these groups have since either died out completely, such as Andrewsarchus (an aggressive wolf-like cow), or declined in diversity, such as the group containing sloths and armadillos. The researchers believe that ou...

Two studies on bee evolution reveal surprises

...evel phylogeny -- the evolutionary development and diversification of a species. Their goal was to examine the early ... existed -- Charles Darwin called their origin and diversification an "abominable mystery." More than 16,000 species of bees, organized into seven families, are kno...

Researchers give name to ancient mystery creature

...aurs went extinct, in a period known for its rapid diversification of small mammals. Based on careful examination of tooth and jaw fragments that have been unearthed over the past 30 years, the University of Alberta researchers have now determined Horolodectes was a small fur-bearing animal that measured 10 centimet...

Can biological traits predict diversification rates in birds?

...h into the role played by ecological traits in the diversification of other types of organisms." The study found tha...eral feeding patterns also had the highest species diversification rates. ...

The evolution of food plants: Genetic control of grass flower architecture

...developmental processes, it is common to find that diversification of morphology between closely related organisms has involved changes in how transcription factors are regulated or how transcription factors interact with their target genes. An understanding of the ramosa pathway in the grass family will be importan...

'Jumping genes' contribute to the uniqueness of individual brains

...rain. Identifying the mechanisms that lead to this diversification has been a longstanding challenge. "People have speculated that there might be a mechanism to create diversity in brain like there is in the immune system, and the immune system's diversity is perhaps the closest analogy we have," says Gage. In the ...

Multi-species genome comparison sheds new light on evolutionary processes, cancer mutations

... new ecological niches for mammals, spurring their diversification and the emergence of new mammalian orders. This situation would have facilitated opportunities for the isolation of mammals into more distinct breeding groups, speeding the development of species-specific chromosomes. "This study has revealed many h...

IMF Launches World’s First DNA Database for Myeloma Patients

...ital size within species -- to an investigation of diversification in genital size between species, inferring possible modes of speciation. Since variation in predator regime exists between as well as within species, we can test specific theoretical predictions regarding genital evolution to evaluate what processes ...

Certain fish have a special mating preference

...ital size within species -- to an investigation of diversification in genital size between species, inferring possible modes of speciation. Since variation in predator regime exists between as well as within species, we can test specific theoretical predictions regarding genital evolution to evaluate what processes ...

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