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How does the embryo turn from gastrula into neurula?
How during gastrulation are the first two germ layers formed? Which are these germ layers?
What is the chorioallantois membrane present in the embryonic development of reptiles and birds?
What are extra embryonic membranes? Name these layers in vertebrates?
What are the destinations of the archenteron and of the blastopore?
Explain pleura?
What are twins? Genetically what are the two types of twins that can be generated?
How yolk sac is formed?
What is yolk sac?
Why can the allantois be considered an adaptation to terrestrial life?
What are the three types of germ layers that form tissues and organs in animals?
After the morula stage what is the next stage?
Is there exchange of cells between the mother and the fetus through the placenta?
From which germ layer do the epidermis and the nervous system originate?
How is the notochord structure formed?
