Natural selection can produce surprising results.It can produce more complex organisms, for example creating multicellular organisms from single-celled ones, but it can also simplify: for example ...

All viewers of this document can see this public note. This is the most explicit and concise description and definition of natural selection in On the Origin of Species. Darwin’s view here is ...

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 ...

The early part of the twentieth century saw evolutionary theory embattled by disagreements over Darwin's emphasis on natural selection. The then-newly rediscovered work of Gregor Mendel in the ...

To constitute natural selection, the difference in survival and/or reproduction cannot be due to chance, and it must have the potential consequence of altering the proportions of the different ...

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 ...

It all comes down to natural selection, or the process by which species pass on the characteristics that enable them to survive. Natural selection is a mechanism of evolution—not evolution itself.