Rna polymerases join nucleotides through what kind of bond?

What statements describe a host organism?

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?

What substance acts to prevent sudden ph changes in bodily fluids?