New Spec Biology - unit 1 A taster of unit one 2.0 / 5 based on 9 ratings ? BiologyASAll boards Created by: AnnairCreated on: 31-05-09 18:06 what is a pathogen A diease causing microorganism 1 of 5 How does a pathogen penetrate an organism's interface Gas- exchange system, skin and digestive system 2 of 5 What is Cancer uncontrolled cell division 3 of 5 Finish the sentence. Antigens are molecules found on the surface of calls 4 of 5 What do B cells produce? plasma and memory cells 5 of 5
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