Kelley wants to conduct an experiment about sound. which question could kelley best test with a scientific experiment? a. why is sound important for everyday communication? b. through which material does sound travel at the greatest speed? c. which sound from a musical instrument is the most pleasant? d. what type of scientists study sound and its properties?

Influenza (the flu) is caused by a virus that attacks the respiratory system. which type of gene is most likely to be widely expressed in the body of someone who contracts the influenza virus? a the gene that controls the production of stem cells b the gene that controls the production of skin cells c the gene that controls the production of red blood cells d the gene that controls the production of white blood cells