Select the correct answer from each drop-down menu. Stan examines a hair under a microscope. Which part of the hair shaft will he analyze to view overlapping scales made of keratinized cells, and which part will he examine to see spindle-shaped cells?

Stan examines a hair found at the crime scene. He notes that the the consists of spindle-shaped cells. has overlapping scales made of keratinized cells, and that the consists of spindle-shaped cells.