The sun's is only visable during a solar eclipse

Which of these statements are true about scientific theories and hypothesis

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.

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation