What is the function of nitrogen-fixing
bacteria?
a. they are able to repair damaged nitrogen compounds.
b. they are able to release nitrogen into the atmosphere.
c. they are able to take atmospheric nitrogen and convert it to
usable ammonium.

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 type of plant is good for a bioassay and where can i buy it? i only have a month.

Use the distance formula to determine weather each pair of segments have the same length