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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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What are the three types of germ layers that form tissues and organs in animals? |
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What is the cell division process directly related to the embryonic growth? |
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What is the germ layer from which the coeloms originate? |
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Why can the amnion also be considered an adaptation to terrestrial life? |
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During REM sleep, which is most likely to occur? |
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What is polyembryony? |
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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 gastrulation? How during gastrulation are the first two germ layers formed? Which are these germ layers? |
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What are twins? Genetically what are the two types of twins that can be generated? |
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What is the difference between amnion and chorion? |
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How is the yolk sac formed? What is the function of the yolk sac? |
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Is there exchange of cells between the mother and the fetus through the placenta? |
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What are the animal pole and the vegetal pole of the vertebrate egg? |
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From which germ layer do blood cells originate? What are other organs and tissues made from that germ layer? |
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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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From which germ layer do the liver and the pancreas originate? What are other organs and tissues made from that germ layer? |
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Are the extra embryonic membranes the same in all vertebrates? |
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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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How are animals classified according to the germ layers present in their embryonic development? |
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