Phylum Porifera and Platyhelminthes Overview
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Phylum Porifera and Platyhelminthes Overview

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Questions and Answers

What type of digenetic trematode is known as a liver fluke?

  • Schistosoma
  • Fasciola (correct)
  • Clonorchis
  • Dicrocoelium

    • Which of the following is categorized as a blood fluke?

  • Echinococcus
  • Hymenolepis
  • Schistosoma (correct)
  • Fasciola

    • Digenetic trematodes are organized by their location in the host. Which of the following groups correctly includes intestinal flukes?

  • Paragonimus
  • Clonorchis (correct)
  • Fasciola
  • Schistosoma

    • Which type of digenetic trematode is NOT classified as a hepatic or liver fluke?

    <p>Giardia</p> Signup and view all the answers

    What is the primary classification method for digenetic trematodes?

    <p>By their location in the host</p> Signup and view all the answers

    What is the primary intermediate host of Taenia saginata?

    <p>Sheep</p> Signup and view all the answers

    Which of the following accurately describes the length of Taenia solium?

    <p>3-5 meters</p> Signup and view all the answers

    What is the final host for both Taenia saginata and Taenia solium?

    <p>Man</p> Signup and view all the answers

    Which of these tapeworms is primarily associated with undercooked pork?

    <p>Taenia solium</p> Signup and view all the answers

    How many proglottids does Taenia saginata typically have?

    <p>1000-2000</p> Signup and view all the answers

    What type of reproductive strategy do some organisms use according to the information provided?

    <p>Both cross fertilization and self fertilization</p> Signup and view all the answers

    What is the method of excretion in the organisms mentioned?

    <p>Single excretory pore opening to the exterior</p> Signup and view all the answers

    What does it mean that the organisms are hermaphrodite?

    <p>They possess both male and female reproductive organs</p> Signup and view all the answers

    Which of the following is a true statement regarding reproduction in these organisms?

    <p>They can reproduce through both self and cross fertilization</p> Signup and view all the answers

    Which of the following options best describes the reproductive capabilities of the organisms discussed?

    <p>They can reproduce via self-fertilization and also cross-fertilization</p> Signup and view all the answers

    What disease is primarily caused by hookworms in humans?

    <p>Severe anemia</p> Signup and view all the answers

    What is a distinctive feature of hookworms?

    <p>The anterior end is bent dorsally in a hook shape.</p> Signup and view all the answers

    What characteristic do both male and female hookworms share?

    <p>Both have a dorsally bent anterior end.</p> Signup and view all the answers

    Which statement is true regarding hookworms?

    <p>They are responsible for causing severe anemia.</p> Signup and view all the answers

    Why are hookworms named as such?

    <p>Their anterior ends are bent in a hook shape.</p> Signup and view all the answers

    What characteristic defines the symmetry of the organism described?

    <p>Radial symmetry</p> Signup and view all the answers

    What is the purpose of the many pores or ostia in the organism?

    <p>To allow water flow</p> Signup and view all the answers

    What is the name given to the internal cavity of the organism?

    <p>Spongocoel</p> Signup and view all the answers

    Which type of cells line the spongocoel within the organism?

    <p>Choanocytes</p> Signup and view all the answers

    Which of the following is NOT a characteristic of the organism described?

    <p>Internal skeleton of bone</p> Signup and view all the answers

    Study Notes

    Phylum Porifera

    • Radially symmetrical
    • Body with many pores or ostia through which water flows
    • The internal cavity is known as spongocoel lined with choanocytes (flagellated cells)

    Digenetic Trematodes

    • Classified based on their location in the host's body
      • Hepatic or liver flukes, e.g. Fasciola
      • Blood flukes, e.g. Schistosoma
      • Intestinal flukes

    Phylum Platyhelminthes

    • Single excretory pore
    • Hermaphrodite
    • Reproduction by cross fertilization and self-fertilization

    Taenia saginata (beef tapeworm)

    • Measures 10-12 meters in length
    • Composed of 1000-2000 proglottids
    • Intermediate host: Sheep
    • Final host: Humans

    Taenia solium (pork tapeworm)

    • Measures 3-5 meters in length
    • Composed of 800-1000 proglottids
    • Intermediate host: Pig
    • Final host: Humans
    • Infection occurs when humans eat raw or insufficiently cooked meat of cows or camel in case of Taenia saginata or meat of pigs in case of Taenia solium.
    • Can cause severe anemia in humans

    Hookworms

    • Anterior end of both sexes is bent dorsally in a hook shape.
    • The worms do not have hooks.

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    Description

    Explore the fascinating world of Phylum Porifera and Platyhelminthes through this comprehensive quiz. Learn about the unique characteristics of sponges and flatworms, including reproductive methods and specific examples like Taenia saginata and Taenia solium. Test your knowledge on the classifications and life cycles of these intriguing organisms.

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