What is the measurement of living human beings for the purpose of of the classification and comparison of human races?

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

Which of these has happened to your food by the time it reaches your small intestine? a. all the macromolecules have been broken down completely. b. lipids and starches have been partially broken down. c. starches and proteins have been partially broken down. d. proteins and lipids have been broken down into subunits.

Which greenhouse gas is emitted when burn fossil fuels for energy? a.nitrogen b.oxygen c.carbon dioxide d.helium