Natural Selection occurs when which of the following conditions are met?

Which layer will become saturated first when rain falls?

Draw the structure of dna nucleotide with adenine as nitrogenous base

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?