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3:08
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Cognito
GCSE Biology - Communicable Disease | Bacterial Disease (2026/27 exams)
⭐️ https://www.cognito.org/ ⭐️ *** WHAT'S COVERED *** 1. Introduction to Bacteria * Distinction between harmful and helpful bacteria (e.g., gut bacteria). * Basic characteristics: single-celled organisms, size relative to human cells, reproduction within hosts, toxin production. 2. Salmonella * Cause of food poisoning. * Transmission ...
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