A strain of corn is genetically engineered to tolerate the low pH of fields that are regularly exposed to severe acid rain. This is an example of

This is an example of a transgenic crop

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.

cells spend most of their time in interphase