For the following questions, either three of the statements are correct and one is false, or three are false and one is correct. Pick out the one odd statement, be it correct or false, and circle the respective letter. Neural Plate Formation a. The neural plate is formed from paraxial mesoderm. Neural plate cells become columnar.
Notoplate cells intercalate causing convergent extension.
The neural plate forms on the dorsal side of the embryo. Atavisms a. Atavisms are rare appearances of phylogenetically old traits in late developmental stages of more evolved species. Supernumerary nipples in humans are atavistic. Pharyngeal arches in humans are an example of atavism. Atavisms can be interpreted as malfunctions of genes that evolved late in the history of a phylum and modify earlier patterns of genetic control.