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Biology: Morphology of Hermaphroditic Worms

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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?

Delivering sperm to the female system Signup and view all the answers

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

Genital pore 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?

Digenea Signup and view all the answers

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

Surrounding the ootype Signup and view all the answers

What is the purpose of the operculum in trematode eggs?

To facilitate the release of the larva from the egg Signup and view all the answers

What is the primary difference between cercariae and adult trematodes?

Body shape and ornamentation Signup and view all the answers

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

Rediae Signup and view all the answers

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

Paragonimus westermani Signup and view all the answers

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

Dioecious flukes Signup and view all the answers

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

It has a common basic structure with variations in numbers and spatial arrangements Signup and view all the answers

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

It is used for feeding and attachment Signup and view all the answers

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

It may be smooth or spined Signup and view all the answers

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

It is incomplete with a mouth, esophagus, pharynx, and blind-ending intestinal ceca Signup and view all the answers

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

Cercariae Signup and view all the answers

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

It is used for attachment Signup and view all the answers