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.
Other members of this group include the clam worms and tube worms, which live in the ocean, and the leeches. The earthworm hunts food at night and thus has been called a night crawler. it usually extends its body from the surface opening of a small tunnel which it makes by eating its way through the soil.