How do scientists try to use dna to prove these theories of how idneans ended up in america?

What effect does plate tectonics have an organic evolution

The probability of producing a normal child by two parents who are carriers for an autosomal recessive disorder is

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.