Nitrogen is second only to phosphorus as a limiting factor for plant growth. What is a limiting factor and how is this possible when 78% of the air around us is nitrogen?

List charasteristics of athenosphere

Ayoung boy has been found and police are trying to locate his family they take a dna sample from him and begin collec dna samples from families who have missing children if police use dna samples only from the fathers, which type of dn technology can they use to identify the boy's parent? y-chromosome analysis omtdna (mitochondrial dna) analysis vntrs (variable tandem repeats) o pcr (polymerase chain reaction) analysis

20 the compound al(nh3)2 has atoms of nitrogen.