400 QUESTIONS, PROBLEMS, AND SUGGESTIONS 



ARTHROPODA 



1. Symmetry of body? Segmentation of body and appendages? 



2. Appendages. — State number, arrangement, and use in each class 

 of Arthropoda. 



3. What are the means and manner of locomotion, defense, and dis- 

 persal in each class? 



4. Nutrition. — (Digestive, circulatory, respiratory, and excretory sys- 

 tems and the organs of these systems.) 



5. Economics. — Name ten arthropods of interest or value (scientific, 

 commercial, or economic). 



6. Compare the two sub-classes of Crustacea as to: (a) plan of body 

 structure; (h) appendages; (c) habitat; (d) locomotion; and (e) value to 

 man or to other animals. 



7. Compare the orders of class Arachnida in structure, habits, habitat, 

 use and harm to man and other animals. 



8. Compare orders of Myriapodn on the same points. Ditto for the 

 orders of Insecta. 



9. Enemies. — Make a list of enemies, animate and inanimate, that 

 injure or destroj^ crustaceans, arachnids, myriapods, and insects (in the 

 adult, larval, or egg stage). 



10. Name an arthropod that shows protective resemblance; warning 

 colors or sounds; alluring colors or odors; parasitism; degeneration; mim- 

 icry; commensalism or symbiosis. 



11. Eyes. — Name an arthropod with simple eyes; with compound eyes; 

 with both simple and compound eyes; and one with no eyes. 



12. Compare the four clases of Arthropoda as to: (1) the head and its 

 appendages; (2) the body and its appendages; and (3) the abdomen and 

 its appendages. 



13. The Young. — How are the eggs and the young of Arthropoda pro- 

 tected in the difTerent classes? 



14. Wings. — Name arthropods with no wings; with one pair; with two 

 pairs. Why this difference? 



15. Stages of Metamorphosis. — What are the lari^ce of insects called in the 

 different orders of insects? W^hat insects furnish the pupa, cocoon, chrys- 

 alis? What is the imago of insects called in the different orders? 



16. Name an order of insects that has no metamorphosis. Why? (see 

 p. 12). 



17. Degeneration. — What orders of insects show examples of degeneration, 

 and why? Of luminosity or phosphorescence? (p. 153). 



18. Odors. — What orders give examples of defensive odors? Of alluring 

 odors? 



19. Glands. — Silk, wax, and others. Use of these glands? 



