Any cause that reduces reproductive success in a proportion of a population potentially exerts evolutionary pressure or selection pressure. With sufficient pressure, inherited traits that mitigate its effects—even if they would be deleterious in other circumstances—can become widely spread through a population. It is a quantitative description of the amount of change occurring in processes investigated by evolutionary biology, but the formal concept is often extended to other areas of research.
Drug resistance in bacteria is an example of an outcome of natural selection.
When a drug is used on a species of bacteria, those that cannot resist die and do not produce offspring, while those that survive potentially pass on the resistance gene to the next generation (vertical gene transmission). The resistance gene can also be passed on to one bacterium by another of a different species (horizontal gene transmission). Because of this, the drug resistance increases over generations. For example, in hospitals, environments are created where pathogens such as C. difficile have developed a resistance to antibiotics.Antibiotic resistance is made worse by the misuse of antibiotics. Antibiotic resistance is encouraged when antibiotics are used to treat non-bacterial diseases, and when antibiotics are not used for the prescribed amount of time or in the prescribed dose.
According to researchers at the American Museum of Natural History, this study presents the first concrete evidence of an evolutionary arms race occurring during the Cambrian period... Evolutionary arms race.
The researchers used fossils and computer modeling to build robotic models that mimicked the movements of ancient creatures, providing a deeper understanding of the evolutionary pressures that drove ...
Within the human digestive tract are trillions of bacteria from thousands of different species ... These bacteria can be vulnerable to infection from viruses called bacteriophages ... The findings suggest that there may be evolutionary pressure on B ... DOI ... ....
According to Fatima Al Ameen, Clinical Psychologist at Nafsi Health, Fomo is deeply rooted in our psychology, driven by the modern pressures of staying connected and relevant.
Sharing food gave early humans an evolutionary advantage ... The release of chemicals that increase our heart rate, raise our blood pressure and intensify our breathing evolved to give us bursts of energy to escape danger.
Sharing food gave early humans an evolutionary advantage ... The release of chemicals that increase our heart rate, raise our blood pressure and intensify our breathing evolved to give us bursts of energy to escape danger.
When men outnumber women in a group of pub drinkers, evolutionary pressure apparently compels them to hit the bar and flash the cash. Name. The first round. Age. As old as pubs ....
Advertisement ...Vestigial structures like this are considered remnants of evolution, demonstrating that they once served a greater purpose and, while now reduced, there’s not been evolutionary pressure to lose the trait entirely ... Advertisement ... .
... a disparity rooted in evolutionary, cognitive, and cultural factors ... The authors trace this bias to evolutionary pressures ... This tendency diminishes for older women, reinforcing its evolutionary roots.
However, when the strategy works, it’s one of nature’s most ingenious examples of predation.This viper’s evolutionary innovation is a reminder of nature’s creativity ... pressures of survival in the wild.
As exploration technology advances, scientists anticipate uncovering more species, each offering insights into the evolutionary pressures and adaptations unique to the deep ocean.
From a genetic perspective, the Tibetan antelope genome data fills an important gap in the study of the subfamily Caprinae species, offering valuable resources to understand how highland species cope with extreme environmental pressures.
From a genetic perspective, the Tibetan antelope genome data fills an important gap in the study of the subfamily Caprinae species, offering valuable resources to understand how highland species cope with extreme environmental pressures.
From a genetic perspective, the Tibetan antelope genome data fills an important gap in the study of the subfamily Caprinae species, offering valuable resources to understand how highland species cope with extreme environmental pressures.
While often regarded as gruesome, this behavior serves as a survival mechanism, a reproductive strategy, or a response to environmental pressures ... This once-rare behavior underscores the ecological pressures threatening their survival.
