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6:43
YouTube
Cognito
A-Level Biology - Defence Mechanisms - Pathogens | Non-specific Defences | Antigens (2026/27 exams)
⭐️ Check out our website https://www.cognito.org/ ⭐️ *** WHAT'S COVERED *** 1. How our bodies respond to pathogens * Definition of a pathogen * Examples including bacteria, protoctists, fungi and viruses * How different pathogens cause disease * The two main types of defence mechanism: non-specific and specific 2. Examples of non ...
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