Viruses and bacteria are both microscopic and can both cause disease. viruses differ from bacteria in that all viruses *
a. have cell walls.
b. can be destroyed by antibiotics.
c. need a living host cell to reproduce.

b. can be destroyed by antibiotics.

Explanation:

Antibiotics can act in two different ways:

As a bactericide, completely destroying bacteria, or as a bacteriostatic, inhibiting their replication.

Antibiotics are ineffective against viruses because they do not have their own metabolism. If the antibiotic is given to a patient with a viral infection, it can cause side effects or even antibiotic resistance problems.

the cell cycle is the final answer! : )

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.