Final answer:
The statement is true; full-grown boa constrictors do shed their skin every three to six months to allow growth and remove parasites.
Step-by-step explanation:
The statement that a full-grown boa constrictor's skin sheds every three to six months is true. Molting is the process of shedding the complete outer layer of skin in snakes, which includes constrictors. This process not only allows the snake to grow by shedding old and restricting skin, but it also serves to remove worn skin and get rid of parasites like mites and ticks. Furthermore, snakes, including boa constrictors, utilize specialized belly scales for movement.
These scales grip surfaces, aiding in locomotion. The frequency of molting varies, typically occurring every few months, which aligns with the skin shedding frequency mentioned for boa constrictors.