Hello, Please answer the following attached Biology question correctly and fully. Thanks! 3. Compare human and sea urchin development prior to and after the gastrulastage.

Gastrulation is, without a doubt, the most important evolutionary development in the animal kingdom. All animal forms emerge from this process, which creates the basic embryonic design of an inner layer separated from an outer layer. The gastrulation mechanism in the sea urchin embryo is incredibly simple and elegant. During cleavage, the cells that will participate in sea urchin gastrulation are chosen. The expression of transcription factors that control each of the many subsequent morphogenetic modifications is one result of such specification.Sea urchins' early events are quite similar to those of humans and other animals. In reality, the steps from fertilization through gastrulation are nearly identical, with the exception being timing. It is quite easy to view sea urchins because they have outward development. The larval stage takes only a few days to develop.Human and sea urchin gametes are the same size, and their growth through the gastrula stage is very similar. Both have radial cleavage and are deuterostomes. In humans, before gastrulation, the embryo is a continuous sheet of epithelial cells and it starts to differentiate for the establishment of cell lineages and it forms the basic axes of the body. In sea urchins, mesenchymal cells and vegetal plate formation occur. A fertilized sea urchin eggs undergo 10 rounds of cleavage and then forms a blastula.