In the common sunflower, patterns of UV-absorbing pigments are controlled by a newly identified regulatory region and may be under the influence of environmental factors.
An in silico analysis of gap junction proteins supports the hypothesis that connexins replaced the primordial innexins in chordate gap junctions due to an evolutionary bottleneck.
Astyanax mexicanus cavefish cope with hypoxic environments by expanding embryonic hematopoietic domains, increasing the capacity for erythrocyte development, and constitutive overexpression of hypoxia-inducible genes.
A theoretical model that considers the diversity of collateral effects among drug resistance mutations provides insights into the development of robust sequential antibiotic treatments.
Marco Todesco, Natalia Bercovich ... Loren H Rieseberg
Variation in patterns of floral UV pigmentation is controlled by a single transcription factor in sunflower and affects both pollinator attraction and responses to environmental stresses.
Evolutionary dynamics of polyploid plants of the genus Cochlearia during past periods of rapid climate change indicate increased rates of speciation and diversification in response to pronounced glacial cycles and cold periods in particular.
Erich R Eberts, Christopher G Guglielmo, Kenneth C Welch Jr
Ruby-throated hummingbirds switch from using torpor to survive nighttime energy emergencies in the breeding season to using it to spare fat stores and gain premigratory mass in the late summer.
Marie Buysse, Anna Maria Floriano ... Olivier Duron
The invasive tick Hyalomma marginatum relies on a dual partner nutritional system to provide B vitamins and avoid nutritional deficiencies due to its exclusive blood diet.
Klara Katarina Nordén, Chad M Eliason, Mary Caswell Stoddard
Despite having different shapes and structures, the melanosomes (melanin-packed organelles) in bird feathers often produce thin melanin layers, giving rise to brilliant iridescence.
