<span>c) volcanoes that form on the oceans floor</span>
Nucleotides are the building blocks of DNA macromolecules
Answer: Option D is correct (12).
Explanation:
Codon is a set of DNA or RNA nucleotides so each amino acids are coded by 3 bases. For the specification of 4 amino acids, 12 bases are required. 3*4=12
The spinal cavity ,is enclosed within the vertebral foramen of the vertebrae
