it's just saliva, or (genetically) they might add things to it to help grow fungus where they put it.
yes
Bat heads, saliva, and fire ants (for the colour ;D )
black ants, brown ants, red ants, bejo beads, wolf spiders, cicada crickets, katydids, the clear-winged Seranious butterfly, goat saliva, and something in Sierra's tea.
Anthills are made of soil, sand, and other materials that ants gather and glue together with saliva. Ants construct anthills by excavating tunnels and chambers underground, then carrying materials to the surface and shaping them into mounds.
the ants dig tunnels that rarely collaspe by spreading silk(from larvea), saliva and feces over tunnels dug with their jaws.
The echidna has a long tongue with sticky saliva, which it uses to catch and eat termites and ants.
Ants construct their intricate ant hills by working together in a highly organized manner. They use a combination of digging, carrying materials, and using their saliva to glue particles together. The ants communicate through pheromones to coordinate their efforts and create complex structures underground.
The anteater's tongue can reach two feet (60 cm) in length, with a width of only 1/2 inch (12.5 mm). The anteater can cover its tongue in a sticky saliva, allowing it to trap ants, and can extend and withdraw it up to 150 times per minute
The glucose in apples highly outweighs the amount of glucose in pears, therefore, apples have a higher sugar rate, probably making apples taste better to ants. In addition, the apples have a high vitamin C level, but pears are only high in Vitamin D, which ants can easily get from sunlight. The vitamin C and glucose levels can easily be dissolved by their gastric juice and enzymes in their saliva, once glucose and vitamin C are digested in the mouth by saliva, it will leave a sugary taste, which every ant will be probable to like.
red ants
Yes ants do produce ants to continue the family.
Elmo's Ants.