Lecture 12 - Insects

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Lecture 12 - Insects
2010-12-18 19:08:45

Covering material from Lecture 12 on Insects in Bio 2484
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  1. Are cockroaches resistant to radiation?
    Yes, but it dies at doses of 20,000 rads. Granted, that’s a lot more than the 1,000 rads that typically kills a human, but it’s far less than other insects such as the D. melanogaster died at 64,000 rads, and a parasitoid wasp species dies at 180,000 rads. There’s a pink bacterium that even survives 1.5 million rads.
  2. How many species of insect have been described?
    1 million
  3. Why parts of an insect’s morphology are characteristic enough to define them into taxonomic groups?
    Antennae and mouth parts are very characteristic of species and orders.
  4. What is responsible for the colouration found in insects?
    Sometimes pigments, such as in damselflies and dragonflies, but often colours are the result of light hitting the exoskeleton. The exoskeleton can have a built in structure that reflects light back in certain ways, particularly with iridescent colours.
  5. What are setae?
    The hairs on an insect.
  6. What two types of metamorphosis are there? What’s the difference?
    Complete and incomplete. Complete metamorphosis is going from one state to another (from larval to pupae). Incomplete is anything else.
  7. How many species of cockroaches have been described? How many are pest species?
    5,000 species, but only 4 are pest species
  8. What are the big four insect orders?
    Coleoptera (beetles), Diptera (true flies), Lepidoptera (moths, butterflies), and Hymenoptera (wasps, bees, ants).
  9. What order do beetles belong in?
  10. What order do flies belong in?
  11. What order do moths and butterflies belong in?
  12. What order do wasps, bees, and ants belong in?