All of the cell types of an adult vertebrate develop from three primary embryonic germ cell layers, e.g. skin epithelium originates from ____ and intestinal epithelium from ____. A)ectoderm, endoderm B)ectoderm; ectoderm C)endoderm; endoderm D)endoderm; ectoderm

Examine whether the statement "Because of the many later developmental transformations that produce the elaborately structured organs, the body plan set up during gastrulation bears little resemblance to the body plan in the adult is true or false.

Give Detailed Solution (no need Handwritten)

An additional notochord is grafted next to the developing neural tube. Answer the following questions. (a) what new cells would you expect to develop in the region of the neural tube closest to the graft? (b) What is the notochord-derived molecule that is responsible for the effect?