Answer: corals, crabs, oysters and urchins
Explanation:
Answer:
Reverse translate from amino acids (protein) to RNA then reverse transcribe to DNA. However, its not exact because there are no introns because they got cut out because they didn't code for the protein so you can't get the original strand and also because some amino acids have multiple codons.
C the correct answer is c because our body produces carbon dioxide and brings in oxygen