Top. A horizontal asymptote is a y-value which a function approaches. The asymptote is parallel to x axis, so is of the form y = a, for all real values of a. Thus if f(x) = y is a function, then y = a, becomes undefined for the function, then the line y = a, is called the asymptote for the function y = f(x).
The African armyworm (Spodoptera exempta) also called okalombo, kommandowurm, or nutgrass armyworm, is an African moth. It is a very deleterious pest, capable of destroying entire crops in a matter of weeks.
Army ant. Army ant (or legionary ant) is the common name for the members of more than 200 known ant species, in different lineages, characterized primarily by their aggressive predatory foraging groups, known as raids, in which huge numbers of ants all forage simultaneously over a certain area, attacking prey en masse.