Hormones are known as what type of molecules?

Prostaglandins and hormones are two types of regulatory molecules in the body. Prostaglandins are lipid molecules, which act as hormones while hormones are either proteins, peptides or steroids.

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Explanation:

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.