Which adds oxygen to the blood? coronary circulation arterial circulation systemic circulation pulmonary circulation

Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

What molecules will be best used to compare different species with the exact same sequence of amino acids? why would two species have the same protein even if the molecules in question is different? (hint: transcription to translation to protein).