T study of adaptation—a central issue in biology since before the time of Darwin—is currently enjoying a renaissance. Ridiculed two decades ago as following a panglossian paradigm (1) that promulgated ‘‘just so stories’’ rather than testing hypotheses, evolutionary biology has become a vibrant field in which a wide variety of methods—ranging from molecular developmental biology to manipulative ...

T study of adaptation—a central issue in biology since before the time of Darwin—is currently enjoying a renaissance. Ridiculed two decades ago as following a panglossian paradigm (1) that promulgated ‘‘just so stories’’ rather than testing hypotheses, evolutionary biology has become a vibrant field in which a wide variety of methods—ranging from molecular developmental biology to manipulative ...

BACKGROUND Honey bees are complex eusocial insects that provide a critical contribution to human agricultural food production. Their natural migration has selected for traits that increase fitness within geographical areas, but in parallel their domestication has selected for traits that enhance productivity and survival under local conditions. Elucidating the biochemical mechanisms of these lo...

Migration between populations can be a major evolutionary force. However, some disagreement exists as to precisely how migration affects population adaptation. Some theories emphasize the inhibitory effects of gene flow between locally adapted populations, whereas others propose that migration can enhance adaptation. Migration has also been theorized to rescue sink populations from extinction. ...

Maternal investment for offspring's growth and survival is widespread among diverse organisms. Vertical symbiont transmission via maternal passage is also pivotal for offspring's growth and survival in many organisms. Hence, it is expected that vertical symbiont transmission may coevolve with various organismal traits concerning maternal investment in offspring. Here we report a novel phenotypi...

In bacteria, physiological change may be effected by a single gene acquisition, producing ecological differentiation without genetic isolation. Natural selection acting on such differences can reduce the frequency of genotypes that arise from recombination at these loci. However, gene acquisition can only account for recombination interference in the fraction of the genome that is tightly linke...

The outer cornea plays an important role in animal adaptation and survival different environments. however, research on the morphological ecological of corneal structure amphibious fishes is limited. In this study, scanning electron microscopy (SEM) was used to evaluate microstructure epithelial cells Oxudercinae. results showed that corneas Oxudercinae species possess microridges, microvilli, ...