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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 |
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2 | |
Turbellarians such as “planaria” are exclusively marine. |
|
| | A) | True |
| | B) | False |
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3 | |
Free-living turbellarians are never parastic. |
|
| | A) | True |
| | B) | False |
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4 | |
The intestines of turbellarians can be… |
|
| | A) | Branched |
| | B) | Simple |
| | C) | Absent |
| | D) | A, B and C above |
| | E) | None of the above is correct |
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5 | |
The Platyhelminthes have ____________ that aid in osmoregulation and the excretion of nitrogenous wastes. |
|
| | A) | Malpighian tubules |
| | B) | Kidneys |
| | C) | Flame cells |
| | D) | Bladders |
| | E) | Ommatidia |
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6 | |
The human liver fluke, Clonorchis sinensis, infects humans who swim or bathe in contaminated water. |
|
| | A) | True |
| | B) | False |
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7 | |
One of the intermediate hosts of the liver fluke (the host that is identified by the sporocyst and redia life stages) is a … |
|
| | A) | Flatworm |
| | B) | Roundworm |
| | C) | Snail |
| | D) | Sponge |
| | E) | None of the above is correct |
|
8 | |
Which of the following is mismatched? |
|
| | A) | Taeniar saginatus—beef tapeworm |
| | B) | Taenia solium—pork tapeworm |
| | C) | Scolex—attachment or holdfast organ |
| | D) | Class Cestoda—roundworms |
| | E) | Proglottid—linear series of sets of reproductive organs |
|
9 | |
The Platyhelminthes are acoelomates with diploblastic tissues and bilateral symmetry. |
|
| | A) | True |
| | B) | False |
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10 | |
Platyhelminthes, Nemertea, and Gnathostomulida are the simplest animals that have primary bilateral symmetry. |
|
| | A) | True |
| | B) | False |
|
11 | |
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 |
|
12 | |
Most turbellarians have a cellular, ciliated epidermis. |
|
| | A) | True |
| | B) | False |
|
13 | |
A meshwork of parenchyma cells, developed from the mesoderm, fills the spaces between muscles and the visceral organs. |
|
| | A) | True |
| | B) | False |
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14 | |
Which of the following is mismatched? |
|
| | A) | Protonephridia—flame bulbs |
| | B) | Ocelli—light-sensitive eyespot |
| | C) | Trematodes—undergo sexual reproduction in their intermediate hosts |
| | D) | Turbellarians—are capable of regeneration |
| | E) | Trematodes—all parasitic flukes |
|
15 | |
The means of infection of the Chinese liver fluke, Clonorchis sinensis, is via metacercariae ingested by eating raw fish. |
|
| | A) | True |
| | B) | False |
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16 | |
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 |
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17 | |
Eating raw snails causes Swimmer's Itch. |
|
| | A) | True |
| | B) | False |
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18 | |
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 monogenetic flukes are direct, with a single host. |
| | C) | Cestodes, or tapeworms, have distinct proglottids with posterior and anterior ends. |
| | 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 |
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19 | |
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 saginata—much more dangerous than Taenia solium |
| | E) | Nemertea—eversible proboscis |
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20 | |
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 any other phylum. |
|
| | A) | True |
| | B) | False |
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21 | |
The nemerteans have a complete digestive tract, unlike the Platyhelminthes, which means that they have a(n)… |
|
| | A) | Rhynchocoel |
| | B) | Anus |
| | C) | Proboscis |
| | D) | Branched digestive tract |
| | E) | None of the above is correct |
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22 | |
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 |
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23 | |
Some investigators believe that a planuloid ancestor may have given rise to one branch of sessile organisms and one bilaterally symmetrical branch. |
|
| | A) | True |
| | B) | False |