Define 'biological species.'

Verified step by step guidance

1. Understand that the concept of a biological species is central to the biological classification of organisms.
2. Recognize that a biological species is defined as a group of organisms that can interbreed and produce fertile offspring in natural conditions.
3. Note that members of the same biological species share genetic similarities and have the ability to exchange genetic material through reproduction.
4. Consider that reproductive isolation (the inability to interbreed successfully with other groups) is key to maintaining the distinctiveness of a species.
5. Acknowledge that this concept, known as the Biological Species Concept, was popularized by Ernst Mayr and is widely used in evolutionary biology to distinguish one species from another.

Key Concepts

Biological Species Concept

The Biological Species Concept defines a species as a group of organisms that can interbreed and produce fertile offspring in natural conditions. This concept emphasizes reproductive isolation, meaning that members of different species do not typically mate or produce viable offspring, thus maintaining distinct genetic identities.

Reproductive Isolation

Reproductive isolation is a key mechanism that prevents different species from interbreeding. It can occur through various barriers, such as temporal isolation (different mating seasons), behavioral isolation (different mating rituals), and mechanical isolation (incompatible reproductive structures), ensuring that species remain genetically distinct.

Gene Flow

Gene flow refers to the transfer of genetic material between populations of the same species or between different species through migration and reproduction. In the context of the Biological Species Concept, limited gene flow between populations helps maintain species boundaries, as it reduces the likelihood of hybridization and genetic mixing.