The scientific theory of evolution by natural selection was conceived independently by two British naturalists, Charles Darwin and Alfred Russel Wallace, in the mid-19th century as an explanation for …

. A recent example is the evolution of resistance to antibiotics in the bacterium Staphylococcus aureus, which leads to more than 100,000 infections and 19,000 fatalities a year in the United State . A …

Dec 2, 2025 · Biological evolution is a process of descent with modification. Lineages of organisms change through generations; diversity arises because the lineages that descend from common …

Natural selection : Darwin emphasised that the selection of useful variations by nature is the main (but not exclusive) mechanism for evolution to occur

In the 1810s, Jean-Baptiste Lamarck outlined a comprehensive theory of evolution in which animals, individually, become more complex and better adapted and then pass these changes onto their …

This tells us a story about the evolution of the muscle scars. Muscle scars (and of course the muscles that made the scars) primitively exist as two equal-sized scars (as in Mercenaria).

Natural selection was the mechanism that Darwin proposed for evolution. With the understanding of genetics, it became evident that factors other than natural selection can change allele frequencies …

The fossil record, DNA research, the evidence that species have common ancestors, and other findings add up to overwhelming evidence that evolution by natural selection is how life on Earth arose and …

This approach to evolution focused biologists’ attention on problems they could investi-gate, the biology of inheritance and the ecology of competition among variants in nature.

Coevolution - when two (or more) species affect each other's evolution. For example, an evolutionary change in the traits of a plant, might affect the traits of an herbivore that eats the plant, which in turn …