I believe that it consists of about 3 billion letters/base pairs
Answer:
-DNA consists of genes that give instructions for making proteins.
#1 the relationship between universes and galaxies is that galaxies are made up of universe. and the relationship between stars and solar systems is every solar system contains at least one star.
#2. galaxies form after several planets form rather close to each other.
#3. the last one I don't know
