Does a potato conduct electricity?
Yes. If you put poles of two dis-similar metals with enough difference in electrical potential it would conduct electricity. The reason has to do with the water in the potato. All water except chemically-pure distilled water will conduct electricity– the more impurities, the faster it conducts. This is why you must run right out of the water if you are swimming in a beach. The salt water will conduct current from a lightening strike hundreds of feet away.