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| 1 | An investigator discovered an organism new to science with the following characteristics: a mouth surrounded by a rotary corona, flame cells, an eyespot; a complete digestive tract with a mouth followed by a mastax, then a complete stomach, intestine, and anus. After considering these characteristics, it would probably be classified as a(n)… |
 | A) | Sponge |
| B) | Rotifer |
| C) | Nematode |
| D) | Hookworm |
| E) | None of the above is correct |
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| 2 | Nematodes are the most important pseudocoelomate animals, both in terms of numbers and their impact on humans. |
| A) | True |
| B) | False |
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| 3 | Some pseudocoelomate phyla are now assigned to the Superphyla Ecdysozoa and Lophotrochozoa. |
| A) | True |
| B) | False |
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| 4 | Pseudocoelomates have a coelom lined with peritoneum that formed from the embryonic blastocoel. |
| A) | True |
| B) | False |
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| 5 | Pseudocoelomate animals have all but one of the following advantages over the acoelomates. |
| A) | Greater freedom of movement |
| B) | Space for the development and differentiation of the digestive, excretory, and reproductive system |
| C) | A simple means of circulation or distribution of materials throughout the body |
| D) | A better means of asexual reproduction |
| E) | A hydrostatic organ |
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| 6 | Based on ribosomal RNA gene analyses, which one of the following phyla is not a member of the Superphylum Ecdysozoa? |
| A) | Nematoda |
| B) | Nematomorpha |
| C) | Rotifera |
| D) | Kinorhyncha |
| E) | Priapulida |
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| 7 | Which of the following is incorrect? |
| A) | Eutely is the constant number of cells or nuclei in individuals of a species |
| B) | Pseudocoelomate phyla are characterized by bilateral symmetry and three germ layers |
| C) | The digestive system of pseudocoelomates is complete |
| D) | The body of pseudocoelomates is typically vermiform with a body wall that is a syncytium |
| E) | Cerebral ganglia are always lacking |
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| 8 | Nematodes may be which of the following? |
| A) | Free-living |
| B) | Saprozoic |
| C) | Coprozoic |
| D) | All of the above |
| E) | None of the above |
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| 9 | Virtually every species of vertebrate and many invertebrates serve as hosts for one or more types of parasitic nematodes. |
| A) | True |
| B) | False |
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| 10 | A hydrostatic organ is highly developed in nematodes, and much functional morphology of nematodes can be best understood in the context of the extremely low hydrostatic pressure in the pseudocoel. |
| A) | True |
| B) | False |
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| 11 | Which of the following is incorrect? |
| A) | Cuticle—noncellular, secreted by the hypodermis |
| B) | Collagen—a structural protein also found in vertebrate connective tissue |
| C) | Muscles—only contract longitudinally in nematodes |
| D) | Parastic nematodes—have an advanced Krebs cycle for metabolism |
| E) | Phasmids—similar to the sensory amphids |
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| 12 | Which of the following is incorrect? |
| A) | Hookworm—Ancylostoma duodenale |
| B) | Pinworm—Enterobius vermicularis |
| C) | Intestinal roundworm—Trichuris trichiura |
| D) | Trichina worm—Trichinella spp |
| E) | All of the above are correct |
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| 13 | It is estimated that nearly 1.2 billion people are infected worldwide with Ascaris lumbricoides. |
| A) | True |
| B) | False |
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| 14 | Which one of the following diseases is NOT caused by filarial worms? |
| A) | Elephantiasis |
| B) | River blindness |
| C) | Swimmer's itch |
| D) | Dog heartworm |
| E) | All of the above are caused by filarial worms |
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| 15 | Which of the following is not correct? |
| A) | The popular name for Nematomorpha is “horsehair worms” |
| B) | The dog heartworm is troublesome, but not dangerous |
| C) | Members of the Phylum Kinorhyncha are all marine worms bearing thirteen segments with spines but no cilia |
| D) | The Phylum Loricifera have a protective external case called a lorica |
| E) | Members of the Phylum Priapulida are marine worms that burrow with their mouths at the surface of the sediment. |
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| 16 | The Lophotrochozoa phyla include all but which of the following? |
| A) | Rotifera |
| B) | Acanthocephala |
| C) | Gastrotricha |
| D) | Entoprocta |
| E) | All of the above belong to the Superphylum Lophotrochozoa |
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| 17 | Which of the following is incorrect? |
| A) | Pharynx—mastax |
| B) | Corona—ciliated crown |
| C) | Lorica—caselike fibrous layer |
| D) | Pedal glands—involved in attachment to a substrate |
| E) | Diploid amictic eggs—thick-shelled eggs produced by haploid females |
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| 18 | Endoparasitic acanthocephalans penetrate the host's intestinal wall with the spiny… |
| A) | Mastax |
| B) | Proboscis |
| C) | Sharpened cilia |
| D) | Cloaca |
| E) | None of the above is correct |
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| 19 | Members of the Phylum Gastrotricha are ventrally flattened animals that are somewhat like rotifers except that they lack a corona and mastax. |
| A) | True |
| B) | False |
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| 20 | The Entoprocta comprise a small phylum containing only 150 species of tiny, sessile animals that resemble hydroid cnidarians but have ciliated tentacles. |
| A) | True |
| B) | False |
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| 21 | In 1995 a tentatively new phylum was discovered on the common Norway lobster. They may be either acoelomate or pseudocoelomate in construction, but their bizarre life cycle includes internal budding from a sessile stage to produce motile stages. The name of this new phylum is… |
| A) | Ectoprocta |
| B) | Enteroprocta |
| C) | Cycliophora |
| D) | Ciliata |
| E) | None of the above is correct |