Answer:The helix structure Of DNA helps prevent it from been expose and also the sugar and phoshate group that are important components of nucleotides forms a backbone on the helix structure or the polynucleotide this back bone is hydrophobic i.e water loving hence wouldn't allow for penetration for water.
2. Hydrogen bond is formed between this bases to keep them in place.
Explanation:
That would be called evolution or in more scientific terms: T<span>he change in the inherited characteristics of biological populations over successive generations. :p
Hope this helps!
</span>
A.
B is wrong since water is not soluble in lipids
