life began at least 3.5 billion years ago, because that is the age of the oldest rocks with fossil evidence of life on earth. These rocks are rare because subsequent geologic processes have reshaped the surface of our planet, often destroying older rocks while making new ones.
The answer is D. The sugar belongs to carbohydrates. The lipids is consisted of glycerol and fatty acid. The proteins is consisted of amino acids. The nucleic acids is consisted of nucleotide.
