Question

What are pathogen ? Name two pathogens each that cause disease in (i) plants and (ii) animals.
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Answer 1

In biology, a pathogen (Greek: πάθος pathos "suffering", "passion" and -γενής -genēs "producer of") in the oldest and broadest sense, is any organism that can produce disease. A pathogen may also be referred to as an infectious agent, or simply a germ.

Plant:Tobbaco Mosaic Virus,Potato Blight Disease

Animal:Ringworm and Aspergillus