Quiz (See related pages) 1 All of the following are aschelminths except the A) Rotifers. B) Kinorhynchs. C) Acanthocephalans. D) Nemerteans. 2 The major unifying aschelminth feature is the A) nervous system. B) muscular system. C) excretory system. D) pseudocoelom. 3 Which of the following is not a common aschelminth feature? A) incomplete digestive tract B) a muscular pharynx C) constant cell numbers (eutely) D) adhesive glands 4 When aschelminths shed their cuticle, this is called A) molting. B) ecdysis. C) eutely. D) both a and b are correct. 5 Which of the following phyla are not pseudocoelomate? A) Acanthocephala B) Rotifera C) Polychaeta D) Nematoda 6 Characteristics of the phylum Rotifera include all of the following except A) a well-developed cuticle. B) absence of protonephridia. C) parthenogenesis is common. D) triploblastic, bilateral, unsegmented, pseudocoelomate. 7 There are __________ classes within the phylum Rotifera. A) two B) three C) four D) five 8 Which of the following is not an external feature of a rotifer? A) cilia B) corona C) germovitellarium D) foot 9 Where would you look for a kinorhynch? A) a marine environment B) a freshwater environment C) on land that is relatively moist D) on land that is relatively dry 10 Which of the following is not a characteristic of the phylum Nematoda? A) triploblastic, bilateral, vermiform B) cuticles are not shed C) complete digestive tract with a mouth surrounded by lips bearing sense organs D) body wall has only longitudinal muscles 11 Which of the following is not true with respect to nematode reproduction? A) Most nematodes are dioecious. B) Most nematodes are dimorphic. C) Males are larger than the females. D) Gonads lie free in the pseudocoelom. 12 The scientific name of the common pinworm is A) Ascaris lumbricoides. B) Enterobius vermicularis. C) Trichinella spiralis. D) Wuchereria bancrofti. 13 The scientific name of the common pork roundworm is A) Ascaris lumbricoides. B) Enterobius vermicularis. C) Trichinella spiralis. D) Wuchereria bancrofti. 14 Members of the phylum Nematomorpha are commonly called the __________ worms. A) horsehair B) Gordian C) round D) both a and b are correct 15 Of the following, which is the most recently described pseudocoelomate animal phylum? A) Pariapulida B) Acanthocephala C) Loricifera D) Nematomorpha 16 Which of the following is a distinct feature that occurs in all pseudocoelomate phyla? A) pseudocoelom B) adhesive glands C) cuticle D) none of the above 17 The aschelminths are seven phyla grouped only for convenience. A) True B) False 18 The aschelminths contain organs for gas exchange and circulation. A) True B) False 19 The majority of rotifers inhabit freshwaters. A) True B) False 20 Nematodes live in both aquatic and terrestrial environments. A) True B) False 21 Acanthocephalans are also known as spiny-headed worms because of their spiny proboscis. A) True B) False 22 A mosquito is necessary for development of Trichinella spiralis. A) True B) False 23 Elephantiasis is caused by filarial worms (i.e., Wuchereria spp.). A) True B) False 24 Ascaris lumbricoides is commonly known as the giant intestinal roundworm of humans. A) True B) False
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