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Question
The first indication of division of labour in the blastomeres appear at
The first indication of division of labour in the blastomeres appear at
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Solution
The correct option is A Gastrula stage
After fertilization, zygote undergoes cleavage divisions forming morula, blastula and further divisions result in the formation of the gastrula. The cells at the earlier stage i.e., morula and blastula are not differentiated. But during gastrulation, the cell differentiates and get sepecialized to perform a specific function. It is the stage in embryonic development where the formation of three germ layer takes place due to rearrangement of cells. Morphological changes start to appear in the embryo and different cell types start recognising each other. Thus, the correct answer is option C.
After fertilization, zygote undergoes cleavage divisions forming morula, blastula and further divisions result in the formation of the gastrula. The cells at the earlier stage i.e., morula and blastula are not differentiated. But during gastrulation, the cell differentiates and get sepecialized to perform a specific function. It is the stage in embryonic development where the formation of three germ layer takes place due to rearrangement of cells. Morphological changes start to appear in the embryo and different cell types start recognising each other. Thus, the correct answer is option C.
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