Answer:Proteins are composed of amino acid molecules linked together by peptide bonds. C, H, N, S, and O are typical atoms that compose amino acids
Explanation: I hope this help mark me brainliest
Answer: DNA
Explanation:
The chemical subunits that make up Deoxyribonucleic Acid and that form the genetic alphabet are called DNA
Arthropods were the first animals to successfully invade land from the sea