| True/False Indicate whether the sentence or statement is true or false. |
| 1. | Arthropods evolved from insects. |
| 2. | Arthropods may have either an open or a closed circulatory system. |
| 3. | Arthropods have an exoskeleton made of chitin. |
| 4. | The bodies of arthropods are encased in a shell-like exoskeleton. |
| 5. | The outer layer of the arthropod exoskeleton is shed during molting, but products of the breakdown of the exoskeleton inner layer are used to make a new exoskeleton. |
| 6. | Most crustaceans are aquatic. |
| 7. | Crustaceans range in size from microscopic forms to huge lobsters. |
| 8. | Despite the high concentrations often found in the sea, copepods play a very small role in the ocean’s food web. |
| 9. | Female spiders use silk to entrap a prospective mate as part of the mating ritual. |
| 10. | Except for the number of legs, millipedes and centipedes are basically the same in structure and diet. |
| Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. |
| 11. | Jointed appendages of arthropods may a. | become specialized for particular functions. | b. | function in locomotion. | c. | function in feeding. | d. | All of the above | | |
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| 12. | All of the following are arthropods except a. | spiders. | c. | crabs. | b. | clam worms. | d. | centipedes. | | | | |
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| 13. | evolutionary origin of arthropod circulatory system : mollusks :: a. | annelid evolution : arthropods | b. | annelid evolution : trilobite | c. | evolution of arthropod segmentation : annelids | d. | evolution of arthropod segmentation : mollusks | | |
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| 14. | If all copepods died, a. | bubonic plague would cease to be a problem. | b. | predators that depend on them would quickly find substitute food sources in the sea and fresh water. | c. | our sources of food from the ocean would disappear. | d. | nothing would change. | | |
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| 15. | Shrimps, lobsters, and crabs are examples of a. | uropods. | c. | hemipods. | b. | copepods. | d. | decapods. | | | | |
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| 16. | crayfish : swimmerets for swimming and reproduction :: a. | lobsters : uropods for reproduction | c. | crabs : telson for eating | b. | shrimp : telson for chewing | d. | crustaceans : gills for breathing | | | | |
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| 17. | Spiders, scorpions, and mites belong to the subphylum a. | Arthropoda. | c. | Chordata. | b. | Crustacea. | d. | Chelicerata. | | | | |
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| 18. | Spiders, scorpions, and ticks belong to the class a. | Isoptera. | c. | Chordata. | b. | Crustacea. | d. | Arachnida. | | | | |
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| 19. | Centipedes a. | have one pair of legs per segment and eat decaying matter. | b. | have two pairs of legs per segment and are predators. | c. | have two pairs of legs per segment and eat decaying matter. | d. | have one pair of legs per segment and are predators. | | |
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| 20. | The name millipede means a. | “thousand feet.” | c. | “one foot per millimeter.” | b. | “hundred feet.” | d. | None of the above | | | | |
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