Based on cell theory, why is a virus considered non-living? a. a virus does not have a nucleus. b. a virus does not contain genetic material. c. a virus is too small to be considered a cell. d. a virus cannot reproduce itself without a host cell.

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.