In the animal kingdom, cephalization is
A) development of eyes at the anterior end of the organism.
B) the ability to respond rapidly to external stimuli.
C) concentration of sensory structures in the head.
D) evolutionary development of a netlike system of veins.
E) development of a body that has paired structures forming a side- to- side mirror image.
Correct Answer:
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A) two germ
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B) ectoderm.
C) endoderm.
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