Multiple Choice
How does an elephant extend a proboscis that has no bone structure in it?
A) Muscles forcibly expand
B) The trunk is an empty chamber and water is forced into it
C) The elephant trunk is an example of a muscular hydrostat
D) This is a hydraulic system similar to what was found in echinoderms
E) Antagonistic muscles operate in pairs across flexible cartilage
Correct Answer:
Verified
Correct Answer:
Verified
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