Chordamesoderm converts some ectoderm into neural ectoderm by
A) increasing the flow of nutrients into those cells.
B) hyperexpression of three homeobox genes.
C) sequestering folic acid in those cells.
D) the first expression of inhibitory hormones in the developing embryo.
E) expressing signaling molecules called Noggin and Chordin.

Question

Quizplus · Accepted Answer

Chordamesoderm expresses signaling molecules called Noggin and Chordin, which block BMP signaling and allow the overlying ectoderm to become neural ectoderm. This is known as neural induction. The other choices are not involved in this process.

Chordamesoderm Converts Some Ectoderm into Neural Ectoderm by