3. Which environmental factor(s) affect skin color? A. Sunlight
b. Ultraviolet light
c. X-rays
d. All of the above

Chicken pox and hepatitis are bacterial diseases. true or false?

Jason adds the antibiotic penicillin to a bacterial culture. the bacteria develop genetic modifications in their genome, which gives them resistance to the antibiotic penicillin. what caused this genetic modification?

Which description provides the best objective summary of the article in the passage?