An individual’s environment can also cause variation. For example, human height is genetically controlled but actual height reached will depend on the nutrition available.

While malaria is the best-understood example of an infectious ... the study of human genetic variation, researchers can exploit the genetic signatures of natural selection using novel analytical ...

The phrase "survival of the fittest" functions principally in evolutionary theory to describe the biological concept of ...

They weren't at all certain that natural populations contained enough genetic variation for natural selection to create ... processes to explain them. For example, where others saw the modern ...

Selection is a powerful force in evolution, and it works in many ways. In the end, however, selection constantly sorts through the variation ... are a famous example of this sort of situation.

“On the other hand, we may feel sure that any variation in the least degree injurious would be rigidly destroyed.” – the often overlooked flip-side of natural selection. Some variations are ...

unpredictable fray of natural selection. With two partners combining varied genes, a species has more flexibility to adapt to changing environments. There are, however, rare examples of asexual ...