Species

Definition

A species is a group of organisms that can interbreed and produce fertile offspring under natural conditions. They share common characteristics and genetic similarities, distinguishing them from other groups.

5 Must Know Facts For Your Next Test

1. Speciation occurs when populations of a species become isolated and evolve independently.
2. The biological species concept defines species based on reproductive isolation.
3. Gene flow between populations can prevent speciation by homogenizing genetic differences.
4. Adaptive radiation is a process where one species gives rise to multiple new species, often due to different environmental niches.
5. Phylogenetic trees are used to illustrate the evolutionary relationships between different species.

Review Questions

• What is the primary criterion for defining a species according to the biological species concept?
• How does gene flow affect the process of speciation?
• What role do phylogenetic trees play in understanding the history of life?

Related terms

Speciation: The formation of new and distinct species in the course of evolution.

Gene Flow: The transfer of genetic material between separate populations.

Adaptive Radiation: The rapid evolution of diversely adapted species from a common ancestor.