Answer and Explanation:
The population of Atlanta grew strongly during the period from 2017 to 2019, thanks to an expansion of the technology center, revitalization of urban centers and regions that were previously undervalued, gradual investment in trade and real estate. This led to a decrease in the birth rate of the city, since people are busy in the labor market and have no plans to have children. This decrease in the birth rate has meant that the population of Atlanta has more elderly people than children, making it an aging population. In addition, the city's economic progress promotes an increase in life expectancy allowing an increase in the elderly population.
The concept was that DNA is what causes bacterial transformation. Before, people thought the genetic material of bacteria was carried through proteins.
I assume here that we mean the thick, characteristic hair that does not appear in women (since women also have some thin and white facial hair) - this is something that appears only at puberty and it's a physical characteristics.
This is then an example of a secondary sex characteristics - the answer is A).
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