How could the urey-miller experiment be changed to accurately reflect our knowledge of the conditions of early earth?
a. add carbohydrate molecules to the water
b. add bacteria to the amino acids
c. add oxygen to the mix of gasses
d. add ultraviolet radiation to the electric current

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt

Anurse is preparing to administer ampicillin 500 mg in 50 ml of dextrose 5% in water (d5w) to infuse over 15 min. the drop factor of the manual iv tubing is 10 gtt/ml. the nurse should set the manual iv infusion to deliver how many gtt/min? (round the answer to the nearest whole number. use a leading zero if it applies. do not use a trailing zero.)

At which point is crust neither created nor destroyed? island chain mid-ocean ridge divergent boundary transform boundary