The answer is the 1st statement.
A trait that can mask another trait is known as a dominant trait.
I believe the answer is D.
A galaxy where mainly stars and planets form around one or more spiral arms. (usually more?)
Answer: A.
Explanation:
Cells generally have a relatively short lifestyle in that they grow, divide and then die off. This is not the case with cancerous cells as those ones mutate and then multiply such that they eventually form a tumor.
Looking at the graph, most of the cells are remaining at a lower or manageable number because they are dying off. Cell A on the other hand is simply increasing in number which means that it is a cancerous cell as it is increasing its number by mutating instead of dying off like other cells would.
