Which reason best explains why dead specimens must be used with transmission electron microscopes?
a. electrons pass over the specimen.
b. the lights that are used are harmful to the specimens.
c. specimens are placed in a vacuum.
d. the image that is produced is two dimensional.

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.