<p>Which of the following led to the increased function of the invertebrate nervous system?</p>
<p>(A) Development of an advanced cerebellum
(B) Evolution of a ventral nerve cord, thus increasing the ability to move
(C) Cephalization of the major sensory organs and the cerebrum
(D) Specialization of the sympathetic and parasympathetic systems within the nervous system
(E) Occurrence of highly developed olfactory lobes in the invertebrate brain</p>
<p>The answer is C. Will someone please tell me a justification of why each other option is not the answer? I've tried this myself:
(A) cerebellum is not that important; it is the center of management for our physical movements and balance... plus, do invertebrates even have cerebellum??
(B) invertebrates do have a ventral nerve cord (nematodes, arthropods, and annelids) but does that increase the ability to move? nerve cord is the center of receiving and processing and transmitting the info....
(D) hum.. I've searched and found out that some invertebrates do have primitive PNS and CNS (worms, insects, and mollusks like squids)-- I'm not sure if PNS and CNS are more important in invertebrate functioning than is cephalization
(E) .. nope.. </p>
<p>Will someone give a better factual justification for each? I really do not have much knowledge about the invertebrate nervous system :)</p>