Answer:
The Galactic Center (or Galactic Centre) is the rotational center of the Milky Way galaxy; it is a supermassive black hole of 4.100 ± 0.034 million solar masses, which powers the compact radio source Sagittarius A*.
I would assume that it would be A
I think it is going to be B. Repairing damaged DNA.
Answer:
D.
Explanation:
Im sure that is is D because when an offspring is identical to the parent that lets you know that it was asexual reproduction.
The answer is: Difficult to control all variables except one being tested
