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 …

Before we look at the evidence, let's make sure we are on the same page about what evolution is. Broadly speaking, evolution is a change in the genetic makeup (and often, the heritable …

Darwin's theory of evolution by natural selection underlies all modern biology. It enables us to decipher our genes and fight viruses, as well as to understand Earth's fossil record and rich …

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 …

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 …

After several false starts, Darwin hit upon the idea of natural selection, which combined his knowledge of variation and inheritance with a realization derived from reading the economist …

Learn about the theory of evolution and how it is supported by instances of direct observation, the existence of homologies and fossils, and certain biogeographical patterns.

New species appeared as replacements for extinct species of the same natural group. D

Three types of evidence support evolution and natural selection: structural, microbiological, and direct observation. Structural evidence encompasses homologous structures and the fossil …

Descent with modification by natural selection explains the adaptation of organisms and the unity and diversity of life. In Campbell Biology (10th ed., pp. 465-470). San Francisco, CA: Pearson. …