Biological adaptation is the evolutionary process through which heritable traits that enhance an organism’s fitness become more prevalent in a population over generations under specific environmental conditions. It operates primarily via natural selection acting on genetic variation, including mutations, recombination, and gene flow, and is constrained by developmental, genetic, and phylogenetic factors. Adaptations can be morphological, physiological, or behavioral and are typically characterized by increased survival or reproductive success in a given niche. The process is dynamic and context-dependent, such that traits advantageous in one environment may be neutral or deleterious in another, contributing to diversification and speciation.
Many male hoverflies have bigger eyes than females, giving them the advantage of better optics and faster photoreceptors in high-speed pursuits to find a preferred partner to breed.
Plants & Animals
May 14, 2026
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7
If you travel around Australia, you will find an incredible diversity of lizards. The three-toed snake-tooth skink (Saiphos reticulatus), for example, is a peculiarly long and stumpy-legged reptile that burrows in rainforest ...
Evolution
May 13, 2026
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13
RIKEN researchers have determined the molecular structure of an enzyme that occurs in fish. This could shed light on molecular processes in a wide range of marine organisms. The work is published in the Journal of Biological ...
Plants & Animals
May 13, 2026
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Daphnia, also known as water fleas, are artists of defense. When their predators live nearby, the water fleas change their body structure to make themselves more difficult to eat. Professor Linda Weiss from Ruhr University ...
Ecology
May 13, 2026
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It's a tough world for microbes. When resources grow limited and environments worsen, microbes have figured out ways to hunker down and go dormant until conditions improve.
Cell & Microbiology
May 13, 2026
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Human childbirth is commonly viewed as uniquely difficult and dangerous. The reason: The combination of bipedalism and large brains creates a tight fit between the baby and the birth canal. Research at the University of Vienna ...
Plants & Animals
May 12, 2026
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129
Plant roots are far more than simple absorption organs: they can adjust their structure to better cope with water stress. Scientists at the University of Geneva (UNIGE), in collaboration with the University of Lausanne (UNIL), ...
Plants & Animals
May 12, 2026
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7
In flowering plants, the transition from cross-fertilization (outcrossing) to self-fertilization has evolved repeatedly across species. This shift is often accompanied by a well-known set of traits collectively called the ...
Plants & Animals
May 12, 2026
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7
Researchers at MIT have suggested that rice seeds can hear the sound of rain, according to a new study. MIT calls it "the first direct evidence that plant seeds and seedlings can sense sounds in nature." Perhaps surprisingly, ...
Plants & Animals
May 11, 2026
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41
When species are subjected to changing environments, they can survive in their current location through genetic adaptation. However, this ability is not unlimited. In a study published in PNAS, biomathematician Jitka Polechová ...
Evolution
May 11, 2026
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