What is a disadvantage of an arthropod exoskeleton?

The statement about the need for an arthropod to shed its exoskeleton to grow is accurate and highlights a significant disadvantage of this structural feature. Arthropods have a rigid exoskeleton made of chitin, which provides protection and structural support but limits growth because it does not expand as the organism does.

As a result, these animals undergo a process called molting or ecdysis, where they periodically shed their old exoskeleton to allow for growth and the development of a new, larger exoskeleton. This process leaves arthropods vulnerable to predators and environmental hazards for a brief period while they are without their protective outer layer. Additionally, during the molting process, the new exoskeleton is initially soft, which further increases their risk.

The need to shed their exoskeleton poses significant challenges in terms of energy expenditure and the timing of vulnerability, making it a notable disadvantage despite the various benefits that an exoskeleton provides.