Scientists can alter plants such as this potato plant in order to produce bigger and better potato crops. to do this, scientists alter specific found in the dna of the plants' cells. a) rna b) chromosomes c) codons d) genes

 D) Genes

Explanation:  Just did this on USA Test Prep :)

i'll try what topic lol

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.