In what time period did archaea first formed?

You and a group of friends are spending your vacation hiking through the mountains. it is cold in the mountains. you will be expending a lot of energy while hiking and you will need plenty of energy to keep you warm. you should pack foods high in to provide the most energy or kilocalories per gram of food. a) carbohydrates b) lipids (fats) c) proteins d) sugars

This is the nitrogenous base only found in rna

What atoms are found in nucleic acid and what atoms are found in proteins? compare the monomers that make up a nucleic acid versus what are the monomers that make up a protein?