Which of the following are physical properties of a penny? choose all that are correct. select one or more:
a. conducts electricity very well.
b. resists corrosion from most acids.
c. reacts to oxygen when heated.
d. slightly red in color.

explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.

hammurabi rulers

good lesson