During the development of an embryo, migration and rearrangement of cells lead to a pattern formation known as
A
Epiboly
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B
Emboly
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C
Involution
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D
Gastrulation
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Solution
The correct option is D Gastrulation Gastrulation is the process of formation of gastrula in early embryology during which the single-layered blastula is reorganized into three-layered structure, called as gastrula. The three layers are ectoderm, mesoderm and endoderm. Thus, the correct answer is option (D).