How does the structure of a type of human tissue relate to its function in the body?

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.

What causes darkening of the skin as melanin production increases

What if the yeast were extremely active and produced more than 100ml gas. would you know? why/why not