If nearly 79% of the atmosphere is made of nitrogen, how could there be a shortage of nitrogen in soil?

Which statement best describes the relationship between an allele and a gene? question 1 a. an allele is a variation of a gene that can be expressed as a phenotype. b. an allele is the part of a gene that attaches to messenger rna molecules. c. an allele is a segment of a dna molecule that controls replication of a gene.

Any sound above what db can cause hearing loss in human beings

What is the cause hearing loss in human being