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Tag: "genus" at biology news

The insect vector always bites twice

...udies of malaria transmission by mosquitoes of the genus Anopheles and human African trypanosomiasis (sleeping sickness) by Glossinia species or tsetse flies, revealed that the antibody response can represent a good indicator of the degree of exposure of humans to bites, which could in the long term allow ...

Columbine flowers develop long nectar spurs in response to pollinators

...d Hodges proved this idea by testing the columbine genus Aquilegia, which is pollinated by bumblebees, hummingbirds and hawkmoths. They found that most of the columbines' nectar spur length evolution happened during shifts in pollinators from bumblebees to hummingbirds, and from hummingbirds to hawkmoth...

Small, self-controlled planes combine plant pathology and engineering

...controlled planes to collect samples of the fungal genus Fusarium tens to hundreds of meters above the surface of the earth. This genus contains some of the world’s most devastating plant and animal pathogens and remains largely a myste...

How plague-causing bacteria disarm host defense

...biological warfare, according to Navarro. The genus Yersinia includes three species of bacteria that are pathogenic to humans: Y. pestis is perhaps the most infamous, being responsible for the bubonic plague (also known as the Black Death), which killed more than 200 million people in the Middle Ages....

Puzzling plankton yield secrets to role in evolution/global photosynthesis

...ces (PNAS). Ocean-dwelling phytoplankton from the genus Ostreococcus emerge at the primitive root of the green plant lineage, dating back nearly 1.5 billion years. Today, these microscopic, free-living creatures, among the smallest eukaryotes ever characterized, barely a micron in diameter, contribute to...

From the deep -- Researchers find new species of sea anemone

...tural History. The two assigned the anemone to the genus Anthosactis primarily due to the roughly uniform length of A. pearseae's tentacles ?a characteristic common to this group of about seven sea anemones. "We tend to differentiate Anthosactis species from other groups of sea anemones by a variety of ...

Discovery of new cave millipedes casts light on Arizona cave ecology

A new genus of millipede was recently discovered by a Northern...own for their cave research, also discovered a new genus of cricket last spring. "We knew the millipedes likely represented two distinct species because...

Leeches ferry infection among newts

...sion of a little-known fungus-like organism of the genus Ichthyophonus, which infects the muscles of red-spotted newts and other amphibians in North America. It does not appear to kill amphibians but might affect their ability to reproduce. "This is the first evidence that newts are getting infected th...

Navigable nanotransport

... this class of compounds was named after the plant genus of pumpkins, the cucurbitaceae. When the mini-pumpkins are linked together, they form an empty sphere with many tiny cavities on its surface. These "pockets" can be filled with certain nitrogen-containing biomolecules, such as spermine, in a very sta...

Stability of mRNA/DNA and DNA/DNA duplexes modulates mRNA transcription

...duplexes across the genomes of four species in the genus Saccharomyces. The researchers found that genes of these organisms are more stable than intergenic regions near their 3?end. In addition, introns (internal non-coding regions in genes) are significantly less stable than exons (coding sequences in gen...

Mystery of fossilized trees is solved

...ry was able to identify the trunks as being of the genus Wattieza, a tree fern-like plant. Small fragments of Wattieza have been found in the past, but there was no direct evidence of how large the plant could grow. The new specimens show that they reached at least 8 metres in height and formed the firs...

Birth rate, competition are major players in hominid extinctions

...of food. "We find that the early members of the genus Homo who succeeded were super ecological opportunists," says Jablonski. "They would eat vegetation and scavenge, kill small animals and forage." Cultural adaptations helped these opportunists to take advantage of whatever food was available. But...

UF scientists discover new genus of frogmouth bird in Solomon Islands

... University of Florida scientists discovered a new genus of frogmouth bird on a South Pacific island. New...ience, in a paper that describes the bird as a new genus and species, now named Rigidipenna inexpectata. "This discovery underscores that birds on remote...

Ocean sampling yields environmental sources of coral symbionts

...searchers has successfully identified algae of the genus known to represent coral symbionts, and has gone o...ates that are similar to those of the Symbiodinium genus that grow within corals—have been isolated from both sand and the water column; however, neither the...

Vanishing beetle horns have surprise function

... one species from the closely related but hornless genus Oniticellus). The scientists found that all seven Onthophagus species examined in the laboratory develop horns during their larval and pupal development. That finding should instigate a complete revision of the evolutionary history of Onthophagus...

A buffet for early human relatives

...e of stone tools and of Paranthropus and Homo, the genus to which modern humans (Homo sapiens) belong. The researchers noted that Paranthropus often has been portrayed as a specialist that lacked a varied diet, and that has been used to explain why Paranthropus went extinct as Africa became drier, whil...

Study illuminates how the plague bacteria causes disease

...ers found that these bacteria, which belong to the genus Yersinia, harbor a protein that mimics an apparently unrelated mammalian enzyme. That copycat protein blocks host cells' capacity to change shape and move, abilities important for cells of the immune system to track down and "eat" foreign invaders, t...

Ancient ape ruled out of man's ancestral line

...ssil skeleton ever found. Little Foot is of the genus Australopithecus, thought by some to be part of the ancestral line which led directly to man. But research by Dr Jo Walker and Dr Bob Cliff of the University of Leeds School of Earth and Environment, with Dr Alf Latham of Liverpool University's Schoo...

New dwarf buffalo discovered by chance in the Philippines

...members of the cattle family and are placed in the genus Bubalus, which includes four living species. Two ...sland of Mindoro. Two poorly known species of the genus Bubalus from the Indonesian island of Sulawesi, known as anoas, are more distantly related. The ne...

Researchers find protein that silences genes

...yer in the silencing. Using the experimental plant genus Arabidopsis, they have shown that HDA6 is located in the nucleus of Arabidopsis cells, and they have imaged it, characterized it biochemically and defined its role in two cellular activities that help bring about gene silencing. According ...

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