Ok. so first, the answer is c. then a. then c again. then b. then finally, d. hope this helps!
Answer:
Nitrogen thet cannot be used by organisms. C.
Explanation:
Free nitrogen is simply molecular nitrogen (N2). Nitrogen, in its molecular form, consists of two nitrogen atoms bound together with a tripple bond. Because it is very stable, N2 is typically nonreactive, and takes a lot of energy to break them apart. Among these are the amino acids necessary for life to begin and which are the building blocks DNA is made from. Basically, any nitrogen that is in an organic compound is considered “fixed” nitrogen and N2 is considered to be “free” nitrogen
Pines, spruces, and firs are conifers
Answer:
population that is unchanging
Explanation:
Vitamin <span>a class of diverse organic substances that occur in many foods in small amounts and are necessary in trace amounts for the normal metabolic functioning of the body</span>
