AP Biology (Mader), 11th Edition

Chapter 39: Locomotion and Support Systems

Pre-Test

1
Which of the following has a hydrostatic skeleton?
A)Planarians
B)Grasshopper
C)Sea star
D)Shark
2
The whiplike movement of roundworms is due to the contraction of their _____ muscles.
A)longitudinal
B)circular
C)transverse
3
All of the following characteristics describe the exoskeletons of arthropods EXCEPT:
A)Are jointed
B)Grows with the animal
C)Must be molted when the animal grows
D)Are formed of chitin
4
Strategies for decreasing the risk of osteoporosis include all of the following EXCEPT:
A)testosterone replacement therapy.
B)engage in regular physical activity.
C)obtaining sufficient Vitamin D daily.
D)consuming 1,000-1,500 mg of calcium per day.
5
An endoskeleton is observed in all of the following EXCEPT:
A)Sharks
B)Echinoderms
C)Molluscs
D)Reptiles
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