Why do cats purr what does it mean when they

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.

Which statement describes john tuzo wilson’s contribution to the theory of plate tectonics?

What is a group of organisms that are closely related and share similar characteristics