Final answer:
Epithelial cells derive from different embryonic layers. d. Nails are not derived from epithelial columns.
Step-by-step explanation:
Epithelial cells derive from the ectoderm, endoderm, and mesoderm layers. The epithelium lining the skin, parts of the mouth and nose, and the anus develop from the ectoderm. The cells lining the airways and most of the digestive system originate in the endoderm, while the endothelium that lines vessels in the lymphatic and cardiovascular system derives from the mesoderm.
In the given options, A) sebaceous glands, B) hair roots, C) hair follicles, and E) sweat glands are derived from epithelial columns. However, D) nails are not derived from epithelial columns. Therefore, the correct answer is D) nails.