Apoint mutation that changes a codon specifying an amino acid into a stop codon is called a a.)missense b.)nonsense c.)silent

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?

Someone with these questions! pls 30 pts