DNA replication begins when something called Helicase (an enzyme) unwinds the helix structure of the DNA. It does this so that Primase can then come along and set down an RNA primer.
Answer:
13. is Option J) all of the above
and 14 I'm not completely sure but I think its option D.
Answer:
Explanation:I know Th at one of the reasons is that they would look at the sun to tell time.