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

Which development stage of a parasitoid kills the host?

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

What is one way insects can prevent parasitoid encapsulation?

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

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

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

How do Strepsiptera females signal to flying males?

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

What is the unique behavior of Strepsiptera males during pupation?

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

Why do females of Strepsiptera never pupate?

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

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

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

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

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

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

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

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

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

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

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

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

<p>By laying eggs (A)</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. (B)</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. (B)</p> Signup and view all the answers

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

<p>Using a stinger (A)</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. (A)</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. (B)</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. (D)</p> Signup and view all the answers

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