6. plants that have nitrogen-fixing bacteria in their roots are called
a fertilizers
b nitrifiers
c ammonias
d legumes

Based on the law of dominance, we would expect percent of the offspring from this cross to have large teeth.

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 is not a characteristic of bacteria? a. they are unicellular. b. they are prokaryotic. c. they are the smallest form of life on earth. d. they are multicellular.