The questions "What are species?" and "How do we identify species ... In this page, you will learn about variation within gene pools, as well as the ways in which this variation can be an ...

Genetic variation describes naturally occurring genetic differences among individuals of the same species. This variation permits flexibility and survival of a population in the face of changing ...

This is called environmental variation. Humans, dogs and goldfish are examples of species. Different species have different characteristics from each other. For example, dogs have tails and humans ...

The variation within a single species has produced differences as large as those between two separate species. Some critics of the theory of evolution argue that it doesn't convincingly explain ...

Paleoanthropologists have learned a lot about Lucy, the world’s most famous hominin fossil, since she was discovered in 1974.

Exploring variation in root traits along topological orders within species is key to understanding functional shifts along root architecture and its anatomical underpinnings. However, no study has ...

Yet, temporal variation is a pervasive feature of the natural world, and species have evolved to exploit such variation. Species can also generate novel sources of temporal variation, such as the ...

Questions about individual variation (behavior, morphology, and physiology) and population patterns (social and genetic structure, population stability, species boundaries) are usually addressed in ...