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