|
| 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) | Brachiopods |
| D) | Ectoprocts |
| E) | None of the above is correct |
|
| 2 | The Phylum Gnathostomulida includes delicate wormlike animals that lack all but which of the following: |
| A) | Pseudocoel |
| B) | Anus |
| C) | Circulatory system |
| D) | Bilateral symmetry |
| E) | None of the above is correct |
|
| 3 | Some protostome phyla are now assigned to the clades Ecdysozoa and Lophotrochozoa. |
| A) | True |
| B) | False |
|
| 4 | Pseudocoelomates have a coelom lined with peritoneum that formed from the embryonic blastocoel. |
| A) | True |
| B) | False |
|
| 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 |
|
| 6 | Based on ribosomal RNA gene analyses, which one of the following phyla is not a member of the clade Gnathifera? |
| A) | Nematoda |
| B) | Acanthocephala |
| C) | Rotifera |
| D) | Cycliophora |
| E) | Phoronida |
|
| 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 |
|
| 8 | Acanthocephalans can be all of which of the following? |
| A) | Terrestrial |
| B) | Endoparasitic |
| C) | Monoecious |
| D) | All of the above |
| E) | None of the above |
|
| 9 | Which of the following is mismatched(arrow) |
| A) | Phylum Ectoprocta?also called bryozoans |
| B) | Brachiopods?resemble bivalved mollusks |
| C) | Phylum Phoronida?wormlike marine forms living in secreted leathery or chitinous tubes |
| D) | Phylum Ectoprocta?water bears living in freshwater |
| E) | Ectoproctans?live in colonies, each member occupying a zoecium |
|
| 10 | The cystid of an ectoproctan includes the body wall plus exoskeleton. |
| A) | True |
| B) | False |
|
| 11 | Ectoprocts reproduce asexually by budding, and one type of freshwater ectoproct has another type of budding that produces hard, resistant capsules containing a mass of germinative cells called? |
| A) | Blastocysts |
| B) | Statocysts |
| C) | Statoblasts |
| D) | Osteoblasts |
| E) | None of the above is correct |
|
| 12 | Which of the following is incorrect? |
| A) | Acanthocephlans? "spiny headed worms" |
| B) | Bryozoans? "moss animals" |
| C) | Phoronidans? "jaw worms" |
| D) | Brachiopods?lampshells |
| E) | All of the above are correct |
|
| 13 | Lophotrochozoans are acoelomate, pseudocoelomate or coelomate. |
| A) | True |
| B) | False |
|
| 14 | What distinguishes the two classes of brachiopods? |
| A) | cleavage type |
| B) | posterior metacoel |
| C) | shell structure |
| D) | food source |
| E) | All of the above choices are correct |
|
| 15 | Which of the following is not correct? |
| A) | Phoronida is the least common lophophorate. |
| B) | Cycliophorans live in the gut of mollusks. |
| C) | Brachiopod numbers are declining. |
| D) | Gnathostomulidans live between grains of sand. |
| E) | There is only one species of Micrognathozoa. |
|
| 16 | The lophotrochozoan subgroup include all but which of the following? |
| A) | Brachiopoda |
| B) | Ectoprocta |
| C) | Phoronida |
| D) | None of the above belong to the subgroup lophotrochozoans |
| E) | All of the above belong to the subgroup lophotrochozoans |
|
| 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 |
|
| 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 |
|
| 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 |
|
| 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 |
|
| 21 | In 1995 a tentatively new phylum was discovered on the common Norway lobster. They are acoelomate 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 |
|
| 22 | Which of the following is NOT true of the Phylum Brachiopoda(arrow) |
| A) | Many thousands of fossil species indicate a much greater diversity than today(apostrophe)s |
| B) | Their name refers to the arms of the lophophore |
| C) | Brachiopods have dorsal and ventral valves, instead of right and left lateral valves as do bivalve molluscs |
| D) | Like bivalves, brachiopods are attached to the substrate by a pedicel |
| E) | All of the above are correct |