Name: 

Arthropods

 
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
 

12. 

All of the following are arthropods except
a.
spiders.
c.
crabs.
b.
clam worms.
d.
centipedes.
 

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
 

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.
 

15. 

Shrimps, lobsters, and crabs are examples of
a.
uropods.
c.
hemipods.
b.
copepods.
d.
decapods.
 

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
 

17. 

Spiders, scorpions, and mites belong to the subphylum
a.
Arthropoda.
c.
Chordata.
b.
Crustacea.
d.
Chelicerata.
 

18. 

Spiders, scorpions, and ticks belong to the class
a.
Isoptera.
c.
Chordata.
b.
Crustacea.
d.
Arachnida.
 

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.
 

20. 

The name millipede means
a.
“thousand feet.”
c.
“one foot per millimeter.”
b.
“hundred feet.”
d.
None of the above
 



 
Check Your Work     Reset Help