How are the mutations in a genome similar to printing a book? every letter in a book resembles the mutations in the genome. errors that appear in one copy can be copied to all other copies of the book. like printing errors, mutations always negatively affect the final product. just as a single book is printed at a time, a single mutation is read at a tim

Option B, errors that appear in one copy can be copied to all other copies of the book.

Explanation:

Genetic errors are very random as DNA replication is an accurate process but still there can be some mistake during the insertion of nucleoside bases.

If such errors are not corrected at the point of occurrence, then it can be replicated at a very fast pace through the entire genetic material thereby causing  serious consequences such as mutation, cancer etc.

Similarly in a book printing, a mistake which get unnoticed can be replicated in other books.

Hence, option B is correct

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.