Characteristics of Order Mermithidae
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Questions and Answers

What is the primary reason for genetically engineering baculoviruses with genes encoding insect-specific toxins?

  • To make the viruses more resistant to pesticides
  • To enhance the viruses' insecticidal efficacy (correct)
  • To increase the viruses' ability to infect a wider range of hosts
  • To improve the structural stability of the viruses
  • Which type of baculovirus is known to infect over 500 species of insects and is most commonly found in Lepidoptera?

  • Obligate parasites
  • Granuloviruses (GV)
  • Nuclear Polyhedrosis Viruses (NPVs)
  • Nucleopolyhedroviruses (NPV) (correct)
  • What are the infectious virus particles of NPVs called when they are occluded in protein bodies?

  • Granuloviruses
  • Nucleopolyhedroviruses
  • Polyhedra (correct)
  • Virions
  • How do insect larvae infected with NPV usually die?

    <p>After 5 to 12 days from infection, depending on various factors</p> Signup and view all the answers

    Where in the insect does reproduction of NPV primarily take place after ingestion by the host?

    <p>Primarily in the fat body, epidermis, and blood cells</p> Signup and view all the answers

    What happens to infected insect larvae just before dying from an NPV infection?

    <p>They crawl to elevated structures where they die and decompose</p> Signup and view all the answers

    What is the general reproductive mode of nematodes?

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

    Which term describes the condition where males and females of nematodes are present separately?

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

    What is the term for the type of parasitism where the parasite may kill the host?

    <p>Obligate parasitism</p> Signup and view all the answers

    Which system is absent in nematodes among the following?

    <p>Respiratory system</p> Signup and view all the answers

    What is the primary method of reproduction in nematodes where males are not required?

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

    Which feature makes Mermithids particularly attractive for biocontrol?

    <p>Inundative release potential</p> Signup and view all the answers

    What is a common characteristic of aquatic Mermithids regarding infection process?

    <p>Entry into the hemocoel leading to early emergence</p> Signup and view all the answers

    Which of these is an example of a terrestrial Mermithid?

    <p>Romanomermis culicivorax</p> Signup and view all the answers

    What is a characteristic of Rhabditidae nematodes in terms of host range?

    <p>Wide host range</p> Signup and view all the answers

    Which statement accurately describes Steinernematidae nematodes?

    <p>Host entry followed by release of Photorhabdus bacteria</p> Signup and view all the answers

    What host range is most susceptible to Steinernema carpocapsae?

    <p>Lepidopterous larvae</p> Signup and view all the answers

    Which species is known for affecting immature Dipterans and being effective at low temperatures?

    <p>Stienernema feltiaz</p> Signup and view all the answers

    What is a common form of host resistance mentioned in the text?

    <p><em>Melanization</em></p> Signup and view all the answers

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