11. Its main use is for protecting livestock against roundworm , strongyles and pinworms. 12. "Setaria cervi " shows sexual dimorphism as a typical roundworm . 13. Several roundworm and spirurid species have been found in the lining of the gizzard. 14. Woodrats may ingest the eggs of the roundworm while foraging at raccoon latrine areas. 15. They have more sophisticated pharynxs than most roundworms . 16. Roundworms and even yeast are much closer to humans genetically than their outward forms suggest.17. In the new method, British researchers added genetic material from a roundworm to bacteria. 18. Roundworms are typically microscopic, and occur in nearly every environment where there is water.19. Roundworms infect hundreds of millions of people.20. Predators include fish, gastropods ( snails ), and nematodes ( tiny roundworms ).
