Michigan Certified Pesticide Category 6J Practice Test

Nematodes are microscopic roundworms. They are multicellular animals with elongated bodies, living in soil, water, or within plant tissues, and some feed on plant roots. That makes the description “Microscopic roundworms” the correct one.

The other statements describe organisms or concepts that don’t match nematodes. One-celled organisms refer to bacteria or some fungi, not multicellular roundworms. Being spread by aphids, leafhoppers, and thrips points to pathogens transmitted by insect vectors, which isn’t how nematodes are typically described. Lastly, nematodes are not fungi; they are animals, so describing them as a form of fungi isn’t accurate.