What characteristic differentiates cardiac muscle cells from skeletal muscle cells?

What happens when the cell copies its chromosomes

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?

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a