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 …

Learn about Charles Darwin's voyage on the HMS Beagle and his ideas about evolution and natural selection.

Unit 18: Evolution and the tree of life About this unit This unit is part of the Biology archive. Browse videos and articles by topic. For our most up-to-date, mastery-enabled courses, check …

This unit is all about evolution—one of the most important concepts in biology. Dive in to learn about the genetic, fossil, and anatomical evidence for evolution, and explore how natural …

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 …

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 …

Explore the fascinating concept of natural selection, a key driver of evolution. Learn how advantageous traits increase survival and reproduction chances, leading to population …

And that's where natural selection comes into the picture. So let's imagine a population, and I'm gonna think about a very abstract population of these little circle-shaped things.

The patterns and processes of evolution play a crucial role in biodiversity. Natural selection, adaptation, and inheritance serve as key mechanisms driving diversity.

Discover the diversity of life on Earth and the forces that shape it! In this section, you can learn about evolution, natural selection, and the tree of life.