For Darwin is most express in affirming that natural selection cannot be supposed the original cause of variation, being only called into play when the variations, as Mr. Dixon says, begin to be ...

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.

There are no values in between (intermediate values), so this shows discontinuous variation. Discontinuous variation is represented as a bar chart.

This variation arises through genetic mutation and is important as it provides the diversity within and between populations required for natural selection. Sclerostin inhibitors enhance bone ...

They weren't at all certain that natural populations contained enough genetic variation for natural selection to create new species. So they entertained other explanations, including inheritance ...

Moreover, he showed that natural populations included enough heritable variation for natural selection to work. Dobzhansky thus bridged the gap between laboratory experiments and field observation ...

Microbes profoundly impact evolution, shaping traits alongside genes. Holobiont biology highlights how hosts and microbes ...

Evolution by natural selection is the process of change in the characteristics of a population in ... Recognize that characteristics are passed from parents to their offspring. Appreciate that ...

This may allow Daphnia pulex to more easily adapt to a change in their environment, as they have a greater degree of genetic variation Natural selection is the process by which certain traits ...

Topics covered include the history of evolutionary thought, the evidence for evolution, the generation and maintenance of population-level variation, natural selection, adaptation, sexual selection, ...