<prompt> All insects have developed resistance to DDT except?MosquitoFleaTsetse fliesTicks  <response>: Ans. is c i.e., Tsetse flies Ahropods showing resistance to DDT - Ahropods showing no resistance to DDT Houseflies e.g., Musca domestica Moquito Culex, Anopheles, Aedes Flea rat flea, Sand flea Lice Pediculus capitiscorporis, Phthirus pubis Ticks Mites Sandlies Phlebotomus Tsetse flies Gluossianae 