What is the definition of a pathogen and give two examples. (3 marks)
An organism that can cause disease - e.g. virus, bacterium, fungus
TR
Related Biology A Level answers
All answers ▸What is the difference between a Prokaryote and a Eukaryote?
How does the structure of DNA make it an effective carrier of genetic information?
What is the difference between Tumour supressor genes and Oncogenes?
What evidence proves that the Y chromosome determines maleness?