Biological evolution is the heritable change in characteristics of biological populations over successive generations, driven by mechanisms such as mutation, recombination, genetic drift, gene flow, and natural and sexual selection. It operates through changes in allele frequencies within gene pools, constrained and shaped by developmental, physiological, and ecological contexts. Evolutionary processes generate adaptation, diversification, and extinction, producing hierarchical patterns from microevolutionary shifts within populations to macroevolutionary dynamics among lineages. At the molecular level, evolution involves sequence variation, genomic rearrangements, and changes in gene regulation, which collectively underlie phenotypic diversity and the emergence of complex biological organization.
The movement of genetic material between organisms that aren't directly related is a significant driver of evolution, especially among single-celled organisms like bacteria and archaea. A team led by researchers at Bigelow ...
Evolution
Sep 6, 2025
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167
MADS-box genes, critical regulatory elements in eukaryotes, have undergone extensive diversification in green plants. Although MADS-box genes have been extensively studied, the understanding of their origin and evolution, ...
Plants & Animals
Sep 5, 2025
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21
A study published in the Proceedings of the National Academy of Sciences by scientists from Israel and Ghana shows that an evolutionarily significant mutation in the human APOL1 gene arises not randomly but more frequently ...
Evolution
Sep 3, 2025
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A tissue fold known as the cephalic furrow, an evolutionary novelty that forms between the head and the trunk of fly embryos, plays a mechanical role in stabilizing embryonic tissues during the development of the fruit fly ...
Evolution
Sep 3, 2025
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25
A study published in Nature Ecology & Evolution reveals a surprising evolutionary insight: sometimes, losing genes rather than gaining them can help bacterial pathogens survive and thrive.
Evolution
Sep 2, 2025
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44
If you're reading this sentence, you might have a fish to thank. Fish were the first animals to evolve jaws. They use their jaws primarily to eat, but also for defense, as tools—such as to burrow or to crack open hard food—and ...
Evolution
Sep 2, 2025
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77
New genetic techniques are shedding light on a mysterious part of our family tree—ancient human relatives called the Denisovans that emerged during the Pleistocene epoch, approximately 370,000 years ago.
An international research team set out to test whether diurnal moths—less threatened by echolocating bats—would have reduced tympanal organs. These specialized hearing organs allow moths to detect the high frequency calls ...
Plants & Animals
Aug 28, 2025
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27
A tiny fossil of a sea creature that lived more than half a billion years ago sheds new light on the evolution of arthropods, the most species-rich and successful group of animals to inhabit Earth, according to a study published ...
Evolution
Aug 28, 2025
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102
You are mostly but not entirely human. If we crunch the numbers, 8% of your genome actually comes from viruses that got stranded there. This viral detritus is a souvenir from our evolutionary past, a reminder that viruses ...
Molecular & Computational biology
Aug 27, 2025
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