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What is cephalization?What type of body symmetry is found in cephalized animals?Explain...

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nikigrays | Student | (Level 1) Honors

Posted February 20, 2013 at 5:54 PM via web

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What is cephalization?
What type of body symmetry is found in cephalized animals?
Explain the adaptive advantage of cephalization in animals.

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trophyhunter1 | College Teacher | (Level 3) Senior Educator

Posted February 24, 2013 at 3:43 PM (Answer #1)

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Cephalization is the development of a head on an organism's body. Organisms like Porifera or Cnidaria lack a head region. Cephalization is usually found in organisms that are bilaterally symmetrical. These include: the Vertebrates--fish, amphibians, reptiles, birds and mammals. A head region is found in Invertebrates like the arthropods including insects, crustacea and arachnids, in Annelid worms and in Platyhelminthes. Having a head means that usually sense organs are located there and a brain can be found inside the head. This helps to improve an organism's response to stimuli and helps to coordinate and control the body processes.

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