Which type of termite has no worker caste in its colony?

The correct answer is Drywood termite. In the social structure of termite colonies, different castes perform various roles essential for the colony's survival. Drywood termites are unique because they do not have a worker caste, which is typically responsible for foraging and caring for the young. Instead, all members of the Drywood termite colony, including soldiers and reproductives, can engage in activities such as foraging for food and maintaining the nest, rather than relying on a specialized worker group. This adaptation allows them to thrive in their typical habitats, which include dry wood and timber materials that provide limited resources.

Other types of termites, such as Dampwood, Subterranean, and Formosan, have a defined worker caste that plays a critical role in the colony's daily functions, like gathering food and building structures, highlighting the distinctive biological and ecological strategies of different termite species.