How was the invasion of zebra mussels in the Hudson River affected one biotic or abiotic factor in the river ecosystem?

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

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 is the role of dna ligase in the elongation of the lagging strand during dna replication?