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At 24 Days After Conception, the Precursor of the PNS

question 20

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At 24 days after conception, the precursor of the PNS is visible in the developing embryo. This structure, which is illustrated here at the end of the pointer line, is the neural At 24 days after conception, the precursor of the PNS is visible in the developing embryo. This structure, which is illustrated here at the end of the pointer line, is the neural   A)  tube. B)  plate. C)  crest. D)  groove. E)  stem.


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