What event starts the Krebs Cycle?

What the theory that the sun goes around earth was replaced with the theory that earth goes around the sun this was an exaple of a

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 pattern of migration do whales follow?