Biology 454, Winter 2007 Name/Number_____________________/_________
1
Problem set #2 (Due Wednesday Feb 21, 11:30. Covers material through Feb 16; 100 pts)
The answers to the questions must be your own and should not be copied from the book, other literature, or
other students. Try to keep your answers to the space provided. Put your name on all pages
1. The Bio 454 web site has a set of insect images “Problem set 2.” For each image, give the order (not the
common name) to which the insect belongs. Use the classification summarized in the Appendix of your
book (6 pts).
1. __________________ 5.___________________ 9. _______________________
2. __________________ 6. ___________________ 10._______________________
3.___________________ 7. ___________________ 11. _______________________
4. ___________________ 8. ___________________ 12. _______________________
2. Insects show 3 major life history strategies: ametabolous, hemimetabolous, and holometabolous. Which
strategy is used by each of the following? (6 pts)
Grasshopper_______________ bark beetle____________________ silverfish_______________
Lacewing_________________ webspinner___________________ thrips _________________
Head louse________________ dragonfly_____________________ stonefly________________
Weevil___________________ earwig_______________________ assassin bug_____________
3. Describe the muscle/exoskeleton arrangement that drives flight in most insects. Although insects
initially had two pairs of wings, there is an evolutionary trend to have a single flight surface (single wing for
flight or coupled fore and hind wings). How is this trend related to the skeleto-muscular system? (18 pts)
