Which option gives the correct cause-and-effect relationship for The development of understanding of genetics and evolution, Theory of evolution (biology only): students must explain that the mechanism of inheritance and variation was not known when Darwin published his theory.

The correct option is Correct cause and effect: DNA is the molecule; a gene is a functional section of that molecule. This matches Theory of evolution (biology only) because students must explain that the mechanism of inheritance and variation was not known when Darwin published his theory.. It is the only option that keeps DNA vs genes separate and answers the approved learning objective in Theory of evolution (biology only).

The correct option is Correct cause and effect: DNA is the molecule; a gene is a functional section of that molecule. This matches Theory of evolution (biology only) because students must explain that the mechanism of inheritance and variation was not known when Darwin published his theory.. Correct cause and effect: DNA is the molecule; a gene is a functional section of that molecule. This matches Theory of evolution (biology only) because students must explain that the mechanism of inheritance and variation was not known when Darwin published his theory. is correct because DNA is the molecule; a gene is a functional section of that molecule. The learning objective says students must explain that the mechanism of inheritance and variation was not known when Darwin published his theory, so the answer must stay inside Theory of evolution (biology only). The alternative options are wrong because they either treating dna as if it always means one gene., calling a gene a whole chromosome., or drift away from when asking about dna, test molecular structure, base sequence, nucleotides, or genetic information storage..