Biology: Morphology of Hermaphroditic Worms

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Questions and Answers

What is the primary function of the vitelline glands in the female reproductive system of Fasciolopsis buski?

  • Producing nutritive and shell materials for eggs (correct)
  • Producing oocytes
  • Storing sperm received from the male system
  • Producing sperm

What is the average size of the adult Fasciolopsis buski?

  • 2 by 0.5 cm
  • 15 by 5 cm
  • 10 by 3 cm
  • 5 by 1.5 cm (correct)

What is the shape of the eggs of Fasciolopsis buski?

  • Triangular
  • Spherical
  • Cylindrical
  • Broadly ellipsoidal (correct)

What is the purpose of the cirrus in the male reproductive system of Fasciolopsis buski?

<p>Delivering sperm to the female system (A)</p> Signup and view all the answers

Where do the male and female reproductive systems of Fasciolopsis buski converge?

<p>Genital pore (B)</p> Signup and view all the answers

What is the term for the alternation of generations between sexually-reproducing adult and asexually reproducing larval stages in trematodes?

<p>Digenea (B)</p> Signup and view all the answers

What is the function of the Mehli's gland in the female reproductive system of Fasciolopsis buski?

<p>Surrounding the ootype (A)</p> Signup and view all the answers

What is the purpose of the operculum in trematode eggs?

<p>To facilitate the release of the larva from the egg (A)</p> Signup and view all the answers

What is the primary difference between cercariae and adult trematodes?

<p>Body shape and ornamentation (A)</p> Signup and view all the answers

Which of the following larval stages of trematodes possesses an oral sucker and rudimentary digestive system?

<p>Rediae (D)</p> Signup and view all the answers

Which of the following is NOT a species of liver fluke?

<p>Paragonimus westermani (B)</p> Signup and view all the answers

What is the term for the group of trematodes that includes species like Schistosoma mansoni and Schistosoma japonicum?

<p>Dioecious flukes (C)</p> Signup and view all the answers

What is the characteristic of the reproductive system in adult trematode worms?

<p>It has a common basic structure with variations in numbers and spatial arrangements (D)</p> Signup and view all the answers

What is the function of the oral sucker in adult trematode worms?

<p>It is used for feeding and attachment (A)</p> Signup and view all the answers

What is the characteristic of the body surface in adult trematode worms?

<p>It may be smooth or spined (B)</p> Signup and view all the answers

What is the characteristic of the digestive system in adult trematode worms?

<p>It is incomplete with a mouth, esophagus, pharynx, and blind-ending intestinal ceca (B)</p> Signup and view all the answers

What is the stage of the trematode life cycle that has rudiments of their reproductive systems?

<p>Cercariae (B)</p> Signup and view all the answers

What is the function of the ventral sucker in adult trematode worms?

<p>It is used for attachment (D)</p> Signup and view all the answers

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