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Species - GCSE Biology Definition

Reviewed by: Lára Marie McIvor

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In biology, a species is a group of similar organisms that can interbreed to produce fertile offspring. Members of the same species share similar characteristics and are more closely related to each other than to organisms in other species. For example, all domestic cats belong to the same species because they can mate and their offspring can also reproduce. Scientists use species as a basic unit for classifying and studying the diversity of life on Earth.

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Lára Marie McIvor

Reviewer: Lára Marie McIvor

Expertise: Biology, Psychology & Sociology Subject Lead

Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.

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