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Notochord is a rodlike structure that forms the supporting axis of the embryo and gives birth to the vertebral column in vertebrates. It is formed by differentiation of mesodermal cells.
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What is notochord? How is this structure formed?
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How does the embryo turn from gastrula into neurula? How is the neural tube formed? What is the embryonic origin of the nervous system in vertebrates?
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How are animals classified according to the germ layers present in their embryonic development?
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What is the cell division process directly related to the embryonic growth?
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What is the function of the vitellus in the vertebrate egg? How are these eggs classified according to the amount of vitellus within them?
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What are the animal pole and the vegetal pole of the vertebrate egg?
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What are the four initial stages of the embryonic development?
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What is the cell division during the first stage of the embryonic development called? How is this stage characterized?
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What are the cells produced in the first stage of the embryonic development called?
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After the morula stage what is the next stage? What is the morphological feature that defines that stage?
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After the blastula stage what is the following stage of the embryonic development? How is the passage from blastula to the next stage called?
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What is gastrulation? How during gastrulation are the first two germ layers formed? Which are these germ layers?
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What are the archenteron and the blastopore? What is the stage of the embryonic development in which these structures are formed? What are the destinations of the archenteron and of the blastopore?
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How is the mesoderm (third germ layer) of triploblastic animals formed?
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What are the three types of germ layers that form tissues and organs in animals?
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