294 papers
Evolutionary biology explores the dynamic history of life on Earth, tracing how species change, adapt, and diversify over time. This field investigates the mechanisms driving everything from the development of antibiotic resistance in bacteria to the complex social behaviors of primates, revealing the deep connections that bind all living organisms together.
On Gist.Science, we ensure these groundbreaking discoveries remain accessible by processing every new preprint uploaded to bioRxiv in this category. Our team generates both plain-language overviews and detailed technical summaries for each paper, bridging the gap between raw research and public understanding without requiring a specialized background.
Below are the latest studies in evolutionary biology, offering fresh insights into the ongoing story of life.
Aedes aegypti populations in Zika-prone areas of Lamu County, Kenya, exhibit very high resistance to permethrin and varying resistance to other pyrethroids, driven by the F1534C mutation, which threatens current vector control strategies and necessitates alternative approaches for arbovirus prevention.
This study demonstrates that in the butterfly *Eurema blanda*, pupal colour plasticity serves as a crucial adaptation against desiccation, where browner, melanised pupae induced by off-leaf substrates exhibit higher survival rates under drying conditions through physiological mechanisms rather than reduced water loss.
This study demonstrates that in the butterfly *Mycalesis mineus*, developmental plasticity induced by dry season conditions simultaneously enhances desiccation tolerance and reduces ventral eyespot size, suggesting that these distinct anti-predatory and physiological traits are developmentally linked.
This simulation study demonstrates that substitution rate variation, rather than hidden paralogy, is the primary driver of false hybridization signals in phylogenetic network inference, particularly biasing the find_graphs method and necessitating empirical calibration of statistical thresholds.
This study reveals that the clingfish family (Gobiesocidae) has undergone a root-level loss of canonical immunoglobulin genes and associated B-cell immune components, while retaining key T-cell and RAG genes, indicating a unique evolutionary erosion of the humoral immune axis rather than a complete loss of adaptive immunity.
This study demonstrates that female reproductive fluid in swordtails can rapidly evolve to bias fertilization toward conspecific sperm, serving as a potent postmating mechanism for reproductive isolation, particularly in species like *X. malinche* that lack strong premating barriers against hybridization.
Using experimental evolution with engineered snowflake yeast, this study demonstrates that obligate multicellularity overcomes fundamental population genetic barriers—specifically genetic drift and conflicting selection pressures—that otherwise constrain collective-level adaptation in facultative life cycles, thereby explaining why complex multicellularity has evolved exclusively in obligately multicellular lineages.
This study demonstrates that engineered tRNAs with unmodified adenine at the wobble position are translationally active but exhibit divergent fitness effects in *E. coli*, where they are neutral or beneficial in four-fold degenerate codon boxes due to superwobbling, yet deleterious in two-fold degenerate boxes likely due to amino acid misincorporation.
This study investigates the transcriptional and translational fate of pseudogenes in mealybug endosymbionts, revealing that while pseudogene transcripts are reduced and proteins are scarce, many transcripts still engage ribosomes, suggesting the tmRNA system plays a crucial role in rescuing ribosomes and degrading aberrant proteins before ribosome binding sites are evolutionarily eroded.
A study on nine *Caenorhabditis elegans* strains demonstrates that natural variation in male frequency fails to predict the magnitude of inbreeding depression or the extent of fitness recovery, indicating that male frequency is a poor proxy for realized outcrossing and its evolutionary benefits.