You are conducting an experiment that requires you to start a treatment on amphibian embryos when the nervous system starts developing.At which stage will you start the treatment?
A) When neural crest cells begin migrating
B) When the ectoderm overlying the notochord flattens into a platelike structure and thickens
C) When the neural tube forms anterior bulges
D) When the somites have finished forming the vertebrae
E) When the chordamesoderm begins involuting

Question

Quizplus · Accepted Answer

The stage when the ectoderm overlying the notochord flattens into a platelike structure and thickens marks the beginning of neural plate formation and the onset of neurulation, during which the neural tissue will eventually form into the brain and spinal cord. Therefore, this is the stage most appropriate for starting a treatment targeting the developing nervous system.

You Are Conducting an Experiment That Requires You to Start