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The “new head” hypothesis:

		Is a theory of how development of primitive chordates into vertebrates involved development of sensory organs from neural crest and placodes
		Is a new theory of how the head developed in primitive chordates by secondary neurulation
		Is a theory of how primary neurulation led to development of the jaws
		Is a theory of how advanced vertebrates developed sophisticated brains which come from neural placodes

60. The “new head” hypothesis:

		Is a theory of how development of primitive chordates into vertebrates involved development of sensory organs from neural crest and placodes
		Is a new theory of how the head developed in primitive chordates by secondary neurulation
		Is a theory of how primary neurulation led to development of the jaws
		Is a theory of how advanced vertebrates developed sophisticated brains which come from neural placodes

נערך Jul 24 '25 - 13:29

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* השאלה נוספה בתאריך: 24-07-2025

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