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Convergent Evolution

Convergent evolution occurs when unrelated species begin to share similar traits.The features are called analogous structures - although they have a different genetic origin they have adapted to perform the same function.Whales are mammals.Whales and fish have a distant hypothetical common ancestor, but their tails and fins are adapted to perform the same functions as they live in the same environment.

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Specification: OCR Biology A (H020), AS-level, 4.2.2 Classification and evolution. Topic: Classification and Evolution.

Key terms in this lesson

pathogen
A microorganism that causes disease.
antibody
A Y-shaped protein (immunoglobulin) produced by B plasma cells that binds specifically to a particular antigen.
active immunity
Immunity produced by an individual's own immune system, either after natural infection or vaccination, involving the production of antibodies and memory cells.

More in Classification and Evolution

All 36 lessons in Classification and Evolution · All OCR AS-level Biology topics