Hans Spemann called the dorsal lip of the blastopore the embryonic organizer because it
A) is the point where gastrulation begins.
B) becomes part of the nervous system.
C) becomes part of the notochord.
D) leads to the establishment of the embryonic axes.
E) is the location at which the sperm enters the egg.

Question

Quizplus · Accepted Answer

The dorsal lip of the blastopore is responsible for the establishment of the embryonic axes, making it the embryonic organizer. Hans Spemann discovered this through his experiments with amphibian embryos, which involved the transplantation of the dorsal lip to different regions of the embryo, resulting in the formation of multiple embryonic axes.

Hans Spemann Called the Dorsal Lip of the Blastopore the Embryonic