Trump was the Republican nominee for President of the United States in the 2016 election, having won the most state primaries, caucuses, and delegates at the 2016 Republican National Convention.[8] He chose Mike Pence, the sitting Governor of Indiana, as his vice presidential running mate.
The core of Darwin's theory is natural selection, a process that occurs over successive generations and is defined as the differential reproduction of genotypes. Natural selection requires heritable variation in a given trait, and differential survival and reproduction associated with possession of that trait.
Although it was known that species evolved, there was no â¦real universally accepted reason why they did so.  Charles Darwin's contribution was combining competition for resources, avoidance of predators, and the ability to attract a mate for the purpose of reproduction into a single theory called Natural Selection.