Answer:
Oceanography
Explanation:
As Oceanography is the interdisciplinary study of the global oceans—from shallow coastal areas to the deepest ocean trenches, from the tropics to the polar seas.
If wrong sry
dude
Protection
it results in 2 exact copies of the original dna strand
The dna is unzipped and the two strands are used as templates for the 2 new dna molecules
4 billion
