When carbon enters the deep ocean how long does it stay there?

The process of replication is the same for all living things because

When one dna molecule is copied to make two dna molecules, the new dna contains a) 25% of the parent dna. b) 50% of the parent dna. c) 75% of the parent dna. d) 100% of the parent dna. e) none of the parent dna.

Which characteristics describe a spiral galaxy?