Answer: alternative D.
Explanation: For the DNA to have the double strand structure, it is necessary to copy the sequence of the existing DNA strand in a complementary sequence of nucleotides, forming hydrogen bonds between them. The mRNA also uses this strategy when reading the DNA strand during the transcription, in order for the translation to begin.
The answer is false. Hope this helps
Inference is d. An observation is something you sense through taste,touch,smell, hear, and see
The answer is D its tightly packed cells allow for proctection against harmful substances.
