Biology (Mader), 10th 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
The exoskeletons of arthropods _____.
A)are jointed
B)are formed of chitin
C)must be molted when the animal grows
D)All of these
4
An endoskeleton is associated with _____.
A)movement
B)support
C)protection of internal organs
D)All of these
5
An endoskeleton is observed in ______.
A)vertebrates
B)mollusks
C)annelids
D)All of these
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