Experiments on Amphibian Embryos Have Shown That the Notochord Secretes

Multiple Choice

Experiments on amphibian embryos have shown that the notochord secretes Chordin and Noggin.If you performed an experiment in which you blocked the production of Chordin and Noggin in the early embryo,the expected result would be an embryo

A) that did not gastrulate.
B) that formed two embryos,joined belly-to-belly.
C) that lacked a developing nervous system.
D) that lacked an outer covering of epidermis.
E) in which the blastopore became the mouth.