Cells move to new positions as an embryo establishes its three germ tissue layers during option(d) i.e, gastrulation.
A young developmental process known as gastrulation occurs when an embryo changes from a one-dimensional layer of epithelial cells (blastula) to a multilayered, multidimensional structure known as the gastrula.
The three embryonic germ layers—the endoderm, ectoderm, and mesoderm—are positioned during gastrulation. Later, these layers grow into specific body systems. The three layers of embryonic tissue, or germ layers, are created as a result of gastrulation. These cells will multiply, move, and differentiate during development into the four main tissues: epithelial tissue, connective tissue, muscle tissue, and nerve tissue.
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Answer:
Main land, peninsula, and islands
Explanation:
I believe the answer is Corticotrophin releasing hormone. Corticotropin-releasing hormone is a peptide hormone involved in the stress response. It is a releasing hormone that belongs to corticotropin-releasing factor family. Its main function is the stimulation of the pituitary synthesis of ACTH, as part of the HPA axis. The Corticotropin releasing hormone derived from the placenta is secreted into the maternal circulation in large amounts during the third trimester of human pregnancy and may have an important role in the onset of labor.
