February 19, 2017

Homework Help: Biology

Posted by mysterychicken on Friday, March 12, 2010 at 5:54pm.

Need help with this--

16. The exoskeleton of an insect
a. does not have any muscles attached to it
b. is moved by muscles that are attached to the inside of the exoskeleton
c. is thickest where the joints of the appendages are located
d. is moved only by muscles attached to the wings


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