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

Question

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

Quizplus · Accepted Answer

The neural crest is the precursor of the peripheral nervous system (PNS) and becomes visible around 24 days after conception in the developing embryo.

-At 24 Days After Conception, the Precursor of the PNS