What is "free" nitrogen?
A) nitrogen that is ready for plants to use
B) nitrogen that has been fixed by bacteria
C) nitrogen that cannot be used by organisms
D) nitrogen that is returned to the soil by decomposes

d

Explanation:

soil need nutrient for it to help plant grow

C: nitrogen that cannot be used by organisms

Explanation:

Free nitrogen is simply molecular nitrogen (N2). Nitrogen, in its molecular form, consists of two nitrogen atoms bound together with a tripple bond. ... So basically, any nitrogen that is in an organic compound is considered “fixed” nitrogen and N2 is considered to be “free” nitrogen.

Hope this helps!!

:)

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates