What is a primary characteristic of Fire ants regarding their worker sizes?

Fire ants exhibit a fascinating characteristic in their worker sizes known as distinct minor and major workers. In a typical fire ant colony, you will notice a range of worker sizes, where minor workers are smaller and more numerous, while major workers, often referred to as "warrior" ants, are larger and have specialized roles such as defending the nest.

This division of labor is crucial for the colony's survival and efficiency. The minor workers are involved in foraging and tending to the queen and brood, while major workers can engage in more physically demanding tasks, including colony defense against intruders. This caste differentiation allows fire ant colonies to adapt their workforce to various tasks depending on the needs of the colony, making them exceptional at resource management.

The other options do not accurately represent the organizational structure of fire ants. There is a clear delineation between worker sizes in fire ant colonies, making the statement about uniform size or lack of defined castes inaccurate. Understanding this characteristic is key to recognizing how fire ants operate and succeed in their environments.