Which monomer has elements bonded together by peptide bonds and is building block for proteins

amino acid are linked by peptides bonds to firm polypeptide chains. proteins are linear pilymers formed by linking the a-carboxylic group of ine amino acid to a-amino group of another amino acid with a peptide bonds ( also called amicide bonds)

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.