Hadean is the first eon of precambrian, and took place around 4.6 and 4.0 billion years ago.
Answer: The statement is true
Explanation:
Natural selection, as its name implies refers to the choice of certain favorable traits such as resistance to diseases, bigger fruit size etc above lesser favorable traits such as easy susceptibility to diseases, small fruit size etc.
Hence, nature allows the traits that will help living organisms survive best in their environment to be passed down to new offsprings while it eliminates all other traits.
Thus, the statement is true
The root word of Unicellular already tells you the answer. Uni means only one cell. So the answer is one cell.
It was the type of diversity that had to do with the niche depending on which niche you are is the amount of varaiaton in your gene pool
