Showing 20 articles starting at article 1701
Categories: Biology: Evolutionary, Chemistry: Biochemistry
Published Chlamydiae expand our view on how intracellular bacteria evolve
(via sciencedaily.com) Original source All chlamydiae today live inside the cells of hosts ranging from amoeba to animals. A team of scientists found that the ancestor of chlamydiae likely already lived inside host cells, but that chlamydiae infecting amoeba evolved later in ways unexpected for intracellular bacteria. The study is an important step for understanding the emergence and evolution of endosymbiotic bacteria, including human pathogens.
Published Urban lizards share genomic markers not found in forest-dwellers
(via sciencedaily.com) Original source Lizards living in different cities have parallel genomic markers when compared to neighboring forest lizards, according to a new study. The genetic variations linked to urbanization underlie physical differences in the urban lizards, including longer limbs and larger toe pads that show how these lizards have evolved to adapt to city environments.
Published Smallpox has plagued humans since ancient Egyptian times, new evidence confirms
(via sciencedaily.com) Original source Smallpox was once one of humanity's most devastating diseases, but its origin is shrouded in mystery. For years, scientific estimates of when the smallpox virus first emerged have been at odds with historical records. Now, a new study reveals that the virus dates back 2,000 years further than scientists have previously shown, verifying historical sources and confirming for the first time that the disease has plagued human societies since ancient times.
Published How evolution works
(via sciencedaily.com) Original source What genetic changes are responsible for the evolution of phenotypic traits? This question is not always easy to answer. A newly developed method now makes the search much easier.