Which medication would most likely be prescribed to a patient with a mechanical valve? a. medication to increase blood volume. b. medication to decrease blood volume. c. medication to increase the viscosity of the blood. d. medication to decrease the viscosity of the blood.

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes