| 1. | Heads develop in animals by an evolutionary trend known as cephalization.
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| 2. | Cephalization is intrinsically connected with a change in chordates from the notochord.
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| 3. | Bilateralization led to the evolution of brains, a process called cephalization.
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| 4. | Consequently, scientists believe that cephalization characterized all bilaterally symmetrical animals from their origins.
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| 5. | In arthropods, cephalization progressed with increasing incorporation of trunk segments into the head region.
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| 6. | Even hydras, which are primitive, radially symmetrical cnidarians, show some degree of cephalization.
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| 7. | Cephalization in vertebrates, the group that includes mammals, birds, and fishes, has been studied extensively.
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| 8. | The cephalization factor and the subsequent encephalization quotient was developed by H . J . Jerison in the late 1960s.
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| 9. | A "'nerve net "'consists of interconnected neurons lacking a brain or any form of cephalization.
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| 10. | In addition, wheel bugs feature cephalization in the form of a pair of long antennae which project from the head.
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