The evolutionary link between sickle-cell trait and malaria resistance showed that humans can and do adapt. But are the “bugs” that make us sick evolving as well? While malaria is the best ...

Aa Aa Aa Natural selection, genetic drift, and gene flow are the mechanisms that cause changes in allele frequencies over time. When one or more of these forces are acting in a population ...

Natural selection is a mechanism of evolution. Organisms that are more adapted to their environment are more likely to survive and pass on the genes that aided their success. This process causes ...

And Darwin knew that the lack of an explanation for heredity left a big gap in his theory of natural selection. In one of the great triumphs of scientific experimentation, Austrian biologist and ...

In his landmark 1942 book, Mayr proposed that Darwin's theory of natural selection could explain ... period of isolation are called "isolating mechanisms," and they discourage the two populations ...

Here we're tracking evolution ... A new study reveals plants, fungi, bacteria, protists, and even some viruses deploy venom-like mechanisms, similar to that of venomous snakes, scorpions and ...