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Study Guide for VT 1176,"Life on Earth: The Segmented Invertebrates"

The focus on this video is on Phylum Arthropoda, with some references to Phylum Annelida.

  1. A presumptive evolutionary selective pressure for a segmented worm body was to:

  3. A region of ocean with deoxygenated water would have what advantages for fossilization?


  5. Very common fossils in the Cambrian period (500 million years ago), with their exoskeletons of calcium carbonate and chitin, were the:


  7. Even the earliest trilobites had what kind of eyes? _______________________________

  8. A wide variety of shapes and sizes indicates that trilobites inhabited _________________________
  9. Trilobites died out about ______________________ million years ago.
  10. A living relative of the trilobite is the _________________________________________________
  11. In the United States, horseshoe crabs can be found ________________________________________
  12. Many crustaceans live ______________________________________________, where they are a food staple for many fish and whales.
  13. Given that they have a hard exoskeleton, how do crustaceans and other arthropods grow?

  15. The giant spider crabs off of Japan demonstrate that crustaceans have (circle one)

  16. ball and socket joints joints hinged in different planes

  17. The many appendages off of a segmented body, can serve many differing functions, including:


  19. All crustaceans live only in the ocean. true false


  21. Millipedes are _______________________________, so that their sexual encounters do not run the risk of being consumed by a mate.


  23. In contrast, scorpions are _____________________, and so involve ritualized __________________ in their mating.

|main page| |background| |03028: Physiology| |03048: Anatomy|

|03050: Invertebrate Zoology| |03051: Vertebrate Zoology| |03074: Economic Botany|


Please send comments and questions to: cronewil@hvcc.edu


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Copyright 1999 by Wilson Crone

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This page updated on October 25, 1999