"Evolution of Disease, Humans, and Animals"

In your own words explain the concept of rRNA then suggest three (3) reasons why scientists choose to use rRNA as an Evolutionary Chronometer.

“Streaming Live and Harlem Renaissance” Please respond to one (1) of the following, using sources under the Explore heading as the basis of your response:

Of the various authors, artists, and musicians who participated in the Harlem Renaissance, identify the person whose autograph you would most want, and explain the reasons why. Provide one (1) example that illustrates the reason why you selected the person that you did.