What is homeostasis? homeostasis is when cells extract energy from food. homeostasis is when cells maintain internal balance. homeostasis is when cells grow. homeostasis is when cells reproduce.

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.

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.