A colony has a female reproductive ant, called a queen, who lays eggs. Those eggs will hatch into worker ants. Larger colonies of ants having millions of ants mostly have female ants making groups of workers, soldiers, or other special castes. Almost all ant colonies also have some fertile male ants called drones.
Rating Newest Oldest. Best Answer: The KâT boundary is a geological signature, usually a thin band, dated to 65.5 million years ago. K is the traditional abbreviation for the Cretaceous period, and T is the abbreviation for the Tertiary period. The boundary marks the end of the Mesozoic era and the beginning of the Cenozoic era, and is associated with the CretaceousâTertiary extinction event, a mass extinction. See the link below for more info. Source(s): http://en.wikipedia.org/wiki/K-t_boundar...
Haiti was about 800 km from Chicxulub at the end of the Cretaceous (Figure 18.3). At Beloc and other localities in Haiti, the K-T boundary is marked by a normal but thick (30 cm) clay boundary layer that consists mainly of glass spherules (Figure 18.2).ridium occurs in normal seafloor sediments in microscopic quantities, but the iridium spike at the K-T boundary is very large. Iridium is rare on Earth, and although it can be concentrated by chemical processes in a sediment, an iridium spike of this magnitude must have arisen in some unusual way.