.. What is the name for an organized group of cells that work together?
tissue
system
gamete
zygote

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.

Which best describes carbon dioxide’s path out of the body

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?