The mechanism that Darwin proposed for evolution is natural selection. Because resources are limited in nature, organisms with heritable traits that favor survival and reproduction will tend to …

Darwin's theory was based on the mechanism of natural selection, which explains how populations can evolve in such a way that they become better suited to their environments …

Review your understanding of natural selection in this free article aligned to NGSS standards.

Discover how evolution remains an ongoing process, with natural selection and genetic variation driving adaptation. Compare evidence across scales to see how unity and diversity arise from …

Mutations simply change the genetic code, and can often add variability which may make an organism more or less fit to its environment. Mutations are the source of variation that powers …

Natural selection is the process by which advantageous inherited traits become more common (and disadvantageous traits become less common) in a population over generations.

Cómo funciona la selección natural a nivel de genes, alelos, genotipos y fenotipos.

Learn about how natural selection works at the level of genes, alleles, genotypes, and phenotypes.

Natural selection is a mechanism of evolution and explains how species adapt to their environment over time through variations in traits. Examples include the peppered moth …

Natural selection is a mechanism of evolution and explains how species adapt to their environment over time through variations in traits. Examples include the peppered moth …