Imagine Looking at a Slide of a Cross Section of a Frog

Multiple Choice

Imagine looking at a slide of a cross section of a frog embryo that has just completed neurulation.Which is the sequence of structures you should see, beginning with inside the gut of the embryo and moving outward?

A) Gut endoderm, epidermis, notochord, neural tube
B) Gut ectoderm, notochord, neural tube, epidermis
C) Gut endoderm, neural tube, epidermis, notochord
D) Gut ectoderm, epidermis, neural tube, notochord
E) Gut endoderm, notochord, neural tube, epidermis