Can a subterranean termite worker develop into a soldier?

A subterranean termite worker can indeed develop into a soldier, which is why the correct answer is affirmative. In the life cycle of subterranean termites, the workers play a crucial role in the colony's development and maintenance. When specific conditions arise, such as a need for additional defense against predators, certain worker termites can undergo a transformation into soldiers. This ability to shift roles within the colony showcases the adaptability of these insects and highlights their complex social structure, allowing for survival and protection of the colony as a whole.

Other options imply limitations that are not generally accurate regarding termite development. The notion that a worker cannot transform into a soldier ignores the biological processes that allow for this flexibility in function within the colony, which is essential for its survival. Additionally, stating that this transformation occurs only under certain conditions or only in large colonies misunderstands the mechanics of termite social structure and environmental responses. In reality, any worker can become a soldier as needed, demonstrating the dynamic nature of these social insects.