Which option gives the correct cause-and-effect relationship for Variation and evolution, Genetic engineering: students must explain that GM crops may be resistant to insect attack or herbicides and may have increased yields.

The correct option is Correct cause and effect: DNA is the molecule; a gene is a functional section of that molecule. This matches Genetic engineering because students must explain that GM crops may be resistant to insect attack or herbicides and may have increased yields.. It is the only option that keeps DNA vs genes separate and answers the approved learning objective in Genetic engineering.

The correct option is Correct cause and effect: DNA is the molecule; a gene is a functional section of that molecule. This matches Genetic engineering because students must explain that GM crops may be resistant to insect attack or herbicides and may have increased yields.. Correct cause and effect: DNA is the molecule; a gene is a functional section of that molecule. This matches Genetic engineering because students must explain that GM crops may be resistant to insect attack or herbicides and may have increased yields. is correct because DNA is the molecule; a gene is a functional section of that molecule. The learning objective says students must explain that GM crops may be resistant to insect attack or herbicides and may have increased yields, so the answer must stay inside Genetic engineering. 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..