Which option best identifies the exact concept boundary 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 Definition boundary: DNA can contain many genes; a gene has a specific coding role. 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 Definition boundary: DNA can contain many genes; a gene has a specific coding role. 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.. Definition boundary: DNA can contain many genes; a gene has a specific coding role. 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 can contain many genes; a gene has a specific coding role. 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 calling a gene a whole chromosome., explaining protein coding without naming the gene as the relevant section of dna., or drift away from when asking about genes, test a section of dna, protein coding, alleles, or inherited characteristics..