Indicate whether each of the following descriptions better applies to these poles established in an early embryo: anterior (A), posterior (P), dorsal (D), ventral (V), animal (N), or vegetal (G). Your answer would be a six-letter string composed of letters A, D, G, N, P, and V only, e.g. ADGPVN.
( ) It defines the part to become internalized in gastrulation.
( ) It defines the parts to remain external.
( ) It defines the location of the future head.
( ) It defines the location of the future tail.
( ) It defines the location of the future belly.
( ) It defines the location of the future back.