DNA replication needs to occur because existing cells divide to produce new cells. Each cell needs a full instruction manual to operate properly. So the DNA needs to be copied before cell division so that each new cell receives a full set of instructions!
Answer:
DNA replication has to occur before cell division in order to make new copies.
Explanation:
The DNA needs to be copied before cell division so that each new cell can recieve a full new set of "instructions".
