97% of the human body is made out of carbon, hydrogen, nitrogen, oxygen,
phosphorus and sulfur (chnops).

a. true

or

b. false

The rate at which molecules water and oxygen can enter a cell is determined by the-

Growth of chest hair, deepening of the voice, and muscle growth are secondary sex characteristics. which most likely affects the development of these traits? testes ovaries prostate gland vulva

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