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Tag: "descent" at biology news

Falling ants glide back to trunk to avoid dangers of forest floor

...g ?what he and his colleagues call directed aerial descent ?in 25 species representing five separate genera. ...ight now are exploring how pervasive such directed descent might be ?we are, in fact, finding it in a variety of wingless arthropods that glide in using a vari...

Where bacteria get their genes

...spread exchange of genes does not blur the line of descent because the acquired genes get lost from the genome at a later point or, if they do persist, the bacteria then transmit them to their offspring. Being able to classify bacteria is crucial for medicine, Ochman said. "If you go to the doctor with stre...

Where Bacteria Get Their Genes

...spread exchange of genes does not blur the line of descent because the acquired genes get lost from the genome at a later point or, if they do persist, the bacteria then transmit them to their offspring. Being able to classify bacteria is crucial for medicine, Ochman said. "If you go to the doctor with stre...

Lactose intolerance linked to ancestral environment

...0 percent and primarily those of Asian and African descent -- stop producing lactase, the enzyme required to digest milk, as they mature. People of northern European descent, however, tend to retain the ability to produce the enzyme and drink milk throughout life. Sherman and former Cornell undergraduate st...

Whole-genome study at Johns Hopkins reveals a new gene associated with abnormal heart rhythm

...hat approximately 60 percent of people of European descent may carry at least one copy of this SNP in the NOS1AP gene. According to the researchers, this particular SNP is responsible for up to 1.5 percent of the difference in QT interval, meaning that other genes, missed in this study, certainly contribute ...

Newly identified mechanism helps explain why people of African descent are more vulnerable to TB

...y help explain the puzzle of why people of African descent are more susceptible to tuberculosis infection and...eptibility of people of African and possibly Asian descent to tuberculosis. The researchers suggest a need for clinical trials to investigate the effect of vi...

The origin of the brain lies in a worm

...ates that vertebrate and annelid CNS are of common descent and vertebrates have turned themselves upside down throughout the course of evolution. "This explains perfectly why we find the same centralised CNS on the backside of vertebrates and the bellyside of Platynereis," Arendt says. "How the inversion o...

Is there a pilot in the insect?

...ithout measuring its ground height, groundspeed or descent speed, in other words without using any of the usual aircraft onboard flight aids like radar, GPS, radio-altimeters and variometers. An insect brain wouldn't cope with these cumbersome, heavy, energy-consuming devices. This important work shows t...

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