Final answer:
If the ends of the hair are not in the curling iron, the hair may not curl properly.
Step-by-step explanation:
If the ends of the hair are not in the curling iron, the likely result will be that the hair will not curl properly.
When curling hair, the heat from the curling iron works to break and reform the hydrogen bonds in the proteins of the hair. These bonds are responsible for the hair's shape and can be altered with heat. However, if the ends of the hair are not placed in the curling iron, they will not be exposed to the heat and will not undergo the curling process. As a result, the ends of the hair will remain straight while the rest of the hair may curl.