Ent 104 Johnson Lecture Outline: Predation and Parasitism in Insects
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Questions and Answers

Which order consists of insects that are exclusively predatory?

  • Mantodea
  • Phasmatodea
  • Odonates (correct)
  • Neuropterans

    • What is a common characteristic of sit and wait predators?

  • They engage in active searches for prey.
  • They use traps to catch prey.
  • They are often fast-moving.
  • They are camouflaged. (correct)

    • How do parasitoids typically lay their eggs on or in their hosts?

  • By injecting them with venom
  • By sitting on top of the host until the egg hatches
  • By secreting chemicals to immobilize the host
  • By using specialized ovipositors (correct)

    • What is the main difference between traditional predators and parasitoids?

    <p>Parasitoids develop into larvae inside or on the host.</p> Signup and view all the answers

    Which development stage of a parasitoid kills the host?

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

    What is one way insects can prevent parasitoid encapsulation?

    <p>Melanizing immune cells to thicken them</p> Signup and view all the answers

    What is an exclusive or mostly parasitic species found in many orders?

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

    How do Strepsiptera females signal to flying males?

    <p>By releasing pheromones</p> Signup and view all the answers

    What is the unique behavior of Strepsiptera males during pupation?

    <p>They leave the host</p> Signup and view all the answers

    Why do females of Strepsiptera never pupate?

    <p>They remain as larva-like insects</p> Signup and view all the answers

    What is the main factor that drives army ants to move often?

    <p>Depletion of food supply</p> Signup and view all the answers

    What is the primary mode of communication among blind driver ants?

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

    Which type of ant has queens that are the largest of all ants?

    <p>Driver ants</p> Signup and view all the answers

    How do army ants forage for food when they dissolve their bivouac?

    <p>Foraging columns</p> Signup and view all the answers

    What is the predominant strategy employed by army ants while attacking social insect nests?

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

    In what way do new queen ants contribute to colony growth?

    <p>By laying eggs</p> Signup and view all the answers

    What role do hyperparasitoids play in the ecosystem?

    <p>They help control pests by feeding on primary parasitoids.</p> Signup and view all the answers

    How do dipteran parasitoids differ from hymenopteran parasitoids in host finding?

    <p>Dipteran larvae sometimes have morphological modifications for host finding.</p> Signup and view all the answers

    What is the main method used by hymenopteran parasitoids to immobilize their hosts?

    <p>Using a stinger</p> Signup and view all the answers

    In what way do avoidance and suppression differ in relation to parasite-host interactions?

    <p>Avoidance hangout triggers encapsulation while suppression interferes with it.</p> Signup and view all the answers

    What distinguishes subversion from destruction in terms of host-parasitoid interactions?

    <p>Subversion is when the parasitoid is encapsulated but tolerates it, whereas destruction weakens the host.</p> Signup and view all the answers

    Why are hymenopteran and dipteran parasitoids considered important selective agents?

    <p>They are involved in evolutionary arms races with their hosts.</p> Signup and view all the answers

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