2. Arachnids have a cephalothorax with _______________________________ legs.

3. _______________________________ are a spider’s fangs; used to inject poison.

4. _______________________________ have a stinger to administer poison.

5. _______________________________ are parasitic and often carry diseases.

6. The class _______________________________ contains: spiders, mites, ticks, scorpions.

7. Most arachnids have _______________________________  body segments.

8. _______________________________ link ancient arthropods and modern arthropods.

9. A scorpion’s _______________________________ are in the form of pincers.

10. Insects are classified by the number of _______________________________.

11. _______________________________ have 2 pairs of legs per body segment and eat decaying material.

12. _______________________________ are the largest class of Arthropods.

13. _______________________________ metamorphosis is egg -> larva -> pupae -> adult.

14. _______________________________ (lobsters, shrimp, crabs, crayfish) have 5 pairs of feet.

15. __________________________ (roly-polys, doodlebugs) have 7 pairs of walking legs and live on land.

16. ______________ (ex. daphnia) are the smallest crustaceans.  They are a vital link in the marine food web. 

17. Insects have 3 main body parts: _______________________________, thorax, abdomen.

18. _______________________________ have 1 pair of legs per body segment and are predators.

19. Class _______________________________ includes crabs, crayfish, lobsters, shrimp, isopods.
 
 

20. ESSAY: Describe 2 ways in which insects are beneficial to humans.