 |
1 | |
The Phyla Platyhelminthes, Nemertea, and Gnathostomulida are not much more complex in organization than radiates except in their bilateral symmetry. |
|
| | A) | True |
| | B) | False |
|
2 | |
The Platyhelminthese are characterized by which of the following? |
|
| | A) | Bilateral symmetry |
| | B) | Organ-level systems |
| | C) | Triploblastic embryonic germ layers |
| | D) | Most are hermaphroditic (dioecious) |
| | E) | All of the above are correct |
|
3 | |
Turbellarians such as "planaria" are frequently used in studies of regeneration, the study of omnipotency of cells, as well as behavioral studies. |
|
| | A) | True |
| | B) | False |
|
4 | |
Free-living turbellarians are never parastic. |
|
| | A) | True |
| | B) | False |
|
5 | |
The intestines of turbellarians frequently are... |
|
| | A) | Branched |
| | B) | Reduced |
| | C) | Straight |
| | D) | Absent |
| | E) | None of the above is correct |
|
6 | |
The Platyhelminthes have ____________ that aid in osmoregulation and the excretion of nitrogenous wastes. |
|
| | A) | Malpighian tubules |
| | B) | Kidneys |
| | C) | Flame bulbs |
| | D) | Bladders |
| | E) | Ommatidia |
|
7 | |
The liver fluke, Clonorchis sinensis, infects humans as its primary host. |
|
| | A) | True |
| | B) | False |
|
8 | |
One of the intermediate hosts of the liver fluke (the host that is identified by the sporocyst and redia life stages) is a member of the taxon... |
|
| | A) | Trematoda |
| | B) | Annelida |
| | C) | Gastropoda |
| | D) | Porifera |
| | E) | None of the above is correct |
|
9 | |
Which of the following is mismatched? |
|
| | A) | Taeniarhynchus saginatus-beef tapeworm |
| | B) | Taenia solium-pork tapeworm |
| | C) | Scolex-attachment or holdfast organ |
| | D) | Class Cestoda-roundworms |
| | E) | Proglottid-"hermaphroditic" arrangement of testes and ovaries |
|
10 | |
The Platyhelminthes are eucoelomate diploblastic Bilateria. |
|
| | A) | True |
| | B) | False |
|
11 | |
Along with bilateral symmetry came a ladder type of nervous system and increasing cephalization. |
|
| | A) | True |
| | B) | False |
|
12 | |
Which of the following is NOT a characteristic of the Platyhelminthes? |
|
| | A) | Protonephridia (flame bulbs) |
| | B) | Dorsoventrally flattened body |
| | C) | Bilateral symmetry |
| | D) | Lack of sense organs |
| | E) | Circular and longitudinal muscles |
|
13 | |
Most turbellarians have a cellular, flagellated epidermis. |
|
| | A) | True |
| | B) | False |
|
14 | |
Recent summaries of the worldwide prevalence of selected parasitic disease show that there are more than enough existing infections for every living person to have one, were they evenly distributed throughout humankind. |
|
| | A) | True |
| | B) | False |
|
15 | |
A meshwork of parenchyma cells, developed from the mesoderm, fills the spaces between muscles and the visceral organs. |
|
| | A) | True |
| | B) | False |
|
16 | |
Which of the following is mismatched? |
|
| | A) | Protonephridia-flame bulbs |
| | B) | Ocelli-light-sensitive eyespot |
| | C) | Trematodes-undergo asexual reproduction in their intermediate hosts |
| | D) | Turbellarians-monophyletic group |
| | E) | Trematodes-all parasitic flukes |
|
17 | |
The means of infection of the Chinese liver fluke, Clonorchis sinensis, is via metacercariae ingested by eating raw fish. |
|
| | A) | True |
| | B) | False |
|
18 | |
The main ill effects of schistosomiasis result from the larval forms. The larvae of one species, S. haemotobium, causes ulceration of the bladder wall with bloody urine and pain on urination. |
|
| | A) | True |
| | B) | False |
|
19 | |
Eating raw snails causes Swimmer's Itch. |
|
| | A) | True |
| | B) | False |
|
20 | |
Which of the following is NOT a correct statement? |
|
| | A) | Lung flukes may cause chronic respiratory symptoms with breathing difficulties and a cough. |
| | B) | Life cycles of monogeneans are direct, with a single host. |
| | C) | Cestodes, or tapeworms, have distinct proglottids and may be colonial. |
| | D) | The scolex is a harpoon-like structure that is used to spear prey. |
| | E) | Proglottid formation of Cestodes may represent a true segmentation according to some experts. |
|
21 | |
Which of the following is incorrect? |
|
| | A) | Beef tapeworm-Taenia saginata |
| | B) | Dog tapeworm-Dipylidium caninum |
| | C) | Oncospheres-larvae that burrow through the intestinal wall |
| | D) | Taenia solium-much more dangerous than Taenia saginata |
| | E) | Pilidium larvae-amoeboid larvae of the Nermertea |
|
22 | |
Nemerteans show some derived features absent from flatworms. One of these is the eversible proboscis and its sheath, for which there are no counterparts among the Platyhelminthes. |
|
| | A) | True |
| | B) | False |
|
23 | |
The nemerteans have a complete digestive tract, unlike the Platyhelminthese, which means that they have a(n)... |
|
| | A) | Rhynchocoel |
| | B) | Anus |
| | C) | Proboscis |
| | D) | Branched digestive tract |
| | E) | None of the above is correct |
|
24 | |
The Phylum Gnathostomulida includes delicate wormlike animals that lack all but which of the following: |
|
| | A) | Pseudocoel |
| | B) | Anus |
| | C) | Circulatory system |
| | D) | Sexual reproduction |
| | E) | None of the above is correct |
|
25 | |
There is little doubt that bilaterally symmetrical animals were derived from a radial ancestor, perhaps via a ciliated larval form similar to the planula larva of cnidarians. |
|
| | A) | True |
| | B) | False |