Where does actual oxygen exchange take place in the human respiratory system? a. bronchi b. trachea c. diaphragm d. alveoli

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 .

Which statement names a physical property of wood? wood does not rustwood can burnwood can rotwood is softer than coal

Which of the following best describes gluconeogenesis? -creation of glycogen from glucose-breakdown of glycogen into glucose-conversion of glucose to fat-synthesis of glucose from noncarbohydrate sources