There is a theoretical protein called largeX that helps to stimulate growth of the body during adolescence. The promoter on the lrgX gene that codes for it is normally able to have a protein bind to it that promotes transcription called largene. Largene, bound to the promoter, can receive yet another signal in the form of largeXase—a protein that changes the conformation of largene so that it can no longer bind to the promoter. It would be accurate to describe the lrgX operon as both positive and repressible
negative and repressible
positive and inducible
negative and inducible

from the original order (top to bottom) the new order will go

1 (founder)

4 (hawk)

2 (mutate)

3 (next generation)

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.

what is this saying?

multiply it by 5 in order for you to understand i cant give an exact answer.