Nitrogen fixation
a. is the process where nitrogen is converted to a usable form
b. is accomplished by plants when they break down soil
c. occurs as a result of photosynthesis
d. none of the above

fun caring loving person

possibly, yes.

explanation:

the amount of sugar you take in is dangerously high, risk of heart disease, high risk of diabetes, and etc.

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.