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.
Invertebrate animals commonly called worms include annelids (earthworms and marine polychaete or bristle worms, nematodes (roundworms), platyhelminthes (flatworms), marine nemertean worms (bootlace worms), marine Chaetognatha (arrow worms), priapulid worms, and insect larvae such as grubs and maggots.