Revision of A HIGHER LEVEL TOPIC on how we sample organisms using the capture-recapture technique in the 2.1 point of the WJEC GCSE Biology course taught in Wales (4.1 for GCSE Science spec). If you are taking foundation level science/biology you DO NOT need to know anything in this video, skip to the next one in the playlist.

Please comment with any questions or queries about any of the topics covered in this video.

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