Answer:
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!
Conduction, convection, and radiation
Ribosomes, mitochondria, ER and chloroplast.
The answer is b. I am not sure exactly how to explain this, but it fits in much better with that question. I hope this could help you!
Explanation:
Adaptations generally occur in order to increase the fitness and thus survival of organisms. By being able to adapt to the changing environment, organisms are better able to survive and reproduce. ... Many people are under the impression that species require thousands or even millions of years to adapt.
HOPE IT HELPS
PLZ MARK AS BRAINLEST
AND FOLLOW..